JP2003256276A - Switch device with incorporated cache with inter-switch data transfer function, and control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a data read time is delayed when the probability of a cache hit is adverse or in the case of access path fault or fault in a switch device. <P>SOLUTION: A storage device 5 is accessed from a server A1 by a switch device A3 via an access path A6 or by a switch device B4 via an access path B7, the switch device A3 and the switch device B4 incorporate a cache memory with inter-switch data transfer function for storing a frame transferred between the server A1 or a server B2 and the storage device 5, and the switch device A3 and the switch device B4 are connected by an inter-switch path 8. When data in a cache memory are updated, the data are transferred with the other switch device via the inter-switch path 8, and the data are synchronized with the cache memory in the other switch device. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch device with a built-in cache having a data transfer function between switches and a control method, and particularly in a system for connecting a server and a storage device using a plurality of switch devices, a data caching function and a switch. The present invention relates to a cache-equipped switch device with a switch-to-switch data transfer function and a control method, which shows a data transfer function between switches and eliminates a delay in data read time from a server to a storage device even when a switch failure or an access path failure occurs.

[0002]

2. Description of the Related Art A conventional cache built-in switch device and a control method are shown in a system configuration diagram in which the conventional cache built-in switch device is connected, and a block diagram showing the conventional cache built-in switch device shown in FIG.

In a system in which a server and a storage device are connected using a plurality of switch devices, the switch devices A3 and B4 are caches for storing frames transferred between the server A1 or server B2 and the storage device 5. The memory 12, the switch control unit 14 that transfers a frame to the corresponding server A1 or server B2 and the storage device 5 according to the transmission destination ID, the frame type is analyzed, and if the command frame is a command frame, the issuing storage device ID and data read It has a command control unit 13 for analyzing addresses and a cache control unit 15 for managing data in the cache memory 12.

First, the operation of the method of storing data in the cache memory 12 will be described. From the server A1,
When a frame is transferred to the storage device 5 by the switch device A3 via the access path A6 or the switch device B4 via the access path B7, the command control unit 1
When No. 3 determines that the transferred frame is a read or write command, it notifies the cache control unit 15 of the command ID.

When a frame is transferred between the storage device 5 and the server A1, the cache controller 15 judges that the transferred frame is data for the read command notified from the command controller 13 and transfers the data. It is stored in the cache memory 12.

The transferred frame is the command control unit 1
If the data is judged to be the data corresponding to the write command notified from 3, the data is stored in the cache memory 12.

Next, the operation of the data transfer method from the cache memory 12 to the server will be described. When a read command is issued from the server A1 to the storage device 5, the command control unit 13 sends a frame with a read command. If it is determined that there is, the cache control unit 15
To notify.

The cache control unit 15 searches the cache memory 12 for the data corresponding to the notified data, and if the data is present in the cache,
The data in the cache memory 12 is transmitted to the server A1, and the command control unit 13 is notified of the cache hit.

Upon being notified of the cache hit, the command control unit 13 stops the transfer of the read command to the storage device 5 and reports the command completion to the server A1 instead of the storage device 5.

If the corresponding data does not exist in the cache, the command control unit 13 is notified that a cache miss has occurred. When the command control unit 13 is notified of the cache miss, it issues a command to the storage device 5 as usual.

When a write command is issued from the server A1 to the storage device 5, the command controller 13
Notifies the cache control unit 15 when it determines that the frame is a write command.

When a frame is transferred between the storage device 5 and the server A1, the cache control unit 15 determines that the transferred frame is data for the write command notified from the command control unit 13, and the cache memory Data is stored in 12, and when the storage of all data in the cache memory 12 is completed, the command control unit 13 is notified of the completion of data transfer.

When the command control unit 13 is notified of the completion of the data transfer, the command control unit 13 reports the completion of the command to the server A1 instead of the storage device 5.

After that, the cache controller 15 transfers data to the storage device 5 and completes the write command to the storage device 5.

In the above configuration, if the use of the switch device by the server is random, the probability of cache hit is low.

This is because the storage device 5 is accessed by the switch device A3 via the access path A6 or the switch device B4 via the access path B7.
This is because the same server cannot use the cache contents of the same switch device again.

Also, when a switch fails or an access path fails, the data read time from the server to the storage device is delayed.

The reason is that when a switch failure or access path failure occurs, the storage device is accessed by the switch device that has passed through the switch device different from the one before the failure when the access is made again, so the contents of the cache of the switch device before the failure occur. Is not available.

[0019]

The first problem of the above-described conventional cache built-in switch device and control method is as follows.
If the use of the switch device from the server is random, the probability of cache hit is low.

The reason is that the same server cannot use the cache contents of the same switch device again.

The second problem is that when a switch fails or an access path fails, the data read time from the server to the storage device is delayed.

The reason is that when a switch failure or access path failure occurs, the storage device is accessed by the switch device that has passed through the switch device different from the one before the failure when the access is made again. Is not available.

An object of the present invention is to transfer the change of the cache memory between the switch devices even if the use of the switch device from the server is random, or when the switch fails or the access path fails, so that the storage device is transferred from the server to the storage device. (EN) Provided are a switch device with a built-in cache having a data transfer function between switches and a control method in which a data read time for the data transfer is not delayed.

[0024]

According to a first aspect of the present invention, there is provided a cache built-in switch device having a switch-to-switch data transfer function and a control method. In a system in which a plurality of switch devices are used for connection, the switch device has a cache memory for storing frames transferred between the server and the storage device, and a switch control for performing frame transfer to the server and the storage device according to a destination ID. Part and frame type,
In the case of a command frame, a command control unit that analyzes the issue destination storage device ID and the data read address, a cache control unit that manages the data in the cache memory, and another switch device when the data in the cache memory is updated. And a data transfer control unit between switches for performing data transfer and synchronizing data with the cache memory of another switch device, and connecting the switch devices by an inter-switch path, and the data in the cache memory is updated. In this case, the data is transferred via the inter-switch path with the different switch device, and the data is synchronized with the cache memory of the different switch device.

The switch device with a built-in cache having a data transfer function between switches of the second invention is a system in which a server and a storage device are connected using a plurality of switch devices, and the switch device transfers between the server and the storage device. Cache memory that stores the generated frame, a switch control unit that transfers the frame to the server and the storage device according to the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID and data read A command control unit that analyzes the address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the data is synchronized with the cache memory of the other switch device. Data transfer between switches The switch unit is configured to connect from the individual switch devices to all other switch devices by an inter-switch path, and when the data in the cache memory is updated, another switch device and the inter-switch path are used. Data transfer is performed and data is synchronized with the cache memory of another switch device.

The switch device with a built-in cache having a data transfer function between switches of the third invention is a system in which a server and a storage device are connected using a plurality of switch devices, and the switch device transfers between the server and the storage device. Cache memory that stores the generated frame, a switch control unit that transfers the frame to the server and the storage device according to the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID and data read A command control unit that analyzes the address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the data is synchronized with the cache memory of the other switch device. Data transfer between switches When the data in the cache memory is updated, it is configured to connect the adjacent switch devices from the individual switch devices by an inter-switch path. Transfer is performed and data is synchronized with the cache memory of another switch device.

A switch device with a built-in cache having a data transfer function between switches according to the fourth invention is a system in which a server and a storage device are connected using a plurality of switch devices, and the switch device transfers between the server and the storage device. Cache memory that stores the generated frame, a switch control unit that transfers the frame to the server and the storage device according to the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID and data read A command control unit that analyzes the address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the data is synchronized with the cache memory of the other switch device. Data transfer between switches Is configured so that each switch device is connected to another switch device by an inter-switch path, and when the data in the cache memory is updated, the data transfer is performed via the another switch device and the inter-switch path. Then, the data is synchronized with the cache memory of another switch device.

According to a fifth aspect of the present invention, there is provided a method for controlling a switch device with a built-in cache having a data transfer function between switches, wherein in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device is a server and a storage device. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Data between the switch and It includes a data transfer control unit, and configured between the switch device so as to connect the inter-switch path,
When the data in the cache memory is updated, the data is transferred via the inter-switch path with another switch device to synchronize the data with the cache memory of the other switch device.

According to a sixth aspect of the present invention, there is provided a method of controlling a cache built-in switch device having a switch-to-switch data transfer function. In a system in which a server and a storage device are connected by using a plurality of switch devices, Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the transmission destination ID, the frame type is analyzed, and if it is a command frame, the issuing storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Data between the switch and Data transfer control unit, and is configured to connect from an individual switch device to all other switch devices by an inter-switch path, and when the data in the cache memory is updated, another switch device and the inter-switch path are connected. Data is transferred via the switch to synchronize the data with the cache memory of another switch device.

According to a seventh aspect of the present invention, there is provided a method of controlling a switch device with a built-in cache having a data transfer function between switches, wherein in the system in which a server and a storage device are connected using a plurality of switch devices, the switch device is a server and a storage device. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Data between the switch and Data transfer control unit, and is configured to connect the adjacent switch devices from each switch device by an inter-switch path, and when the data in the cache memory is updated, another switch device and the inter-switch path are connected. Data is transferred via the data transfer device to synchronize the data with the cache memory of another switch device.

According to an eighth aspect of the present invention, there is provided a method of controlling a switch device with a built-in cache having a data transfer function between switches, wherein in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device is a server and a storage device. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Data between the switch and The data transfer control unit is configured to connect each switch device to another switch device through an inter-switch path, and when the data in the cache memory is updated, another switch device and the inter-switch path are used. The data is transferred by the data transfer, and the data is synchronized with the cache memory of another switch device.

According to a ninth aspect of the present invention, there is provided a method of controlling a switch device with a built-in cache having a switch-to-switch data transfer function, wherein in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device is a server and a storage device. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the transmission destination ID, the frame type is analyzed, and if it is a command frame, the issuing storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Data between the switch and It includes a data transfer control unit, and configured between the switch device so as to connect the inter-switch path,
From the server, via the access path, using the switch device,
When a frame is transferred to the storage device, the command control unit analyzes the frame type and command code, and when it judges that the transferred frame is a read or write command, it notifies the cache control unit of the command ID, and the storage device When a frame is transferred between the server and the server, the cache control unit analyzes the frame type and the command ID, and if it determines that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is the storage ID, time,
When the transfer start address, the transfer data size, and the data are stored in the cache memory and it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set to the storage ID.
Then, the time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when the data in the cache memory is updated, the data is transferred via another switch device and the inter-switch path, and the other switch device's Synchronize data with cache memory.

According to a tenth aspect of the present invention, there is provided a method for controlling a cache built-in switch device having a switch-to-switch data transfer function. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the transmission destination ID, the frame type is analyzed, and if it is a command frame, the issuing storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with A data transfer control unit, and is configured to connect each switch device to all other switch devices by an inter-switch path, and a frame is transferred from the server to the storage device by the switch device via the access path. When transferred, the command control unit analyzes the frame type and the command code, and when it judges that the transferred frame is a read or write command, it notifies the cache control unit of the command ID, and the storage device and the server communicate with each other. When the frame is transferred, the cache control unit analyzes the frame type and the command ID, and when the transferred frame is determined to be the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID. , Time, transfer start address, transfer data size, and data When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the destination ID is set as the storage ID, and the time, transfer start address, transfer data size, and data are set. When the data is stored in the cache memory and the data in the cache memory is updated, the data is transferred via the inter-switch path with another switch device, and the data is synchronized with the cache memory of the other switch device.

According to an eleventh aspect of the present invention, in a method of controlling a switch device with a built-in cache having a data transfer function between switches, in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device is a server and a storage device. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with Data transfer control unit, and is configured to connect between adjacent switch devices from each switch device by an inter-switch path, and the frame is transferred from the server to the storage device by the switch device via the access path. In this case, the command control unit analyzes the frame type and the command code, and when it judges that the transferred frame is a read or write command, it notifies the cache control unit of the command ID, and the frame is transferred between the storage device and the server. When the data is transferred, the cache control unit analyzes the frame type and the command ID, and when it judges that the transferred frame is the data for the read command notified from the command control unit, sets the transmission source ID as the storage ID, Time, transfer start address, transfer data size, and data When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the destination ID is set as the storage ID, and the time, transfer start address, transfer data size, and data are set. When the data is stored in the cache memory and the data in the cache memory is updated, the data is transferred via the inter-switch path with another switch device, and the data is synchronized with the cache memory of the other switch device.

According to a twelfth aspect of the present invention, in a method of controlling a switch device with a built-in cache having a data transfer function between switches, in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device is a server and a storage device. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the transmission destination ID, the frame type is analyzed, and if it is a command frame, the issuing storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with The data transfer control unit is configured to connect each switch device to another switch device by an inter-switch path, and a frame is transferred from the server to the storage device by the switch device via the access path. In this case, the command control unit analyzes the frame type and the command code, and when it judges that the transferred frame is a read or write command, it notifies the cache control unit of the command ID, and the frame is transferred between the storage device and the server. When transferred, the cache control unit analyzes the frame type and the command ID, and when it judges that the transferred frame is the data for the read command notified from the command control unit, the transmission source I
When D is a storage ID, the time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination When the storage ID is the ID, the time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when the data in the cache memory is updated, the data is transferred via another switch device and the inter-switch path, Data is synchronized with the cache memory of another switch device.

According to a thirteenth aspect of the present invention, there is provided a method of controlling a switch device with a built-in cache having a data transfer function between switches. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the transmission destination ID, the frame type is analyzed, and if it is a command frame, the issuing storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with A data transfer control unit, the switch devices are configured to be connected by an inter-switch path, and when the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit updates the data. When the cache controller updates the data in the cache memory, the switch-to-switch data transfer control unit is notified that the data has been updated. The storage ID of the cache contents, the time, the transfer start address, and the transfer data size. , The data content is transferred to another switch device via the inter-switch path, and the inter-switch data transfer control unit of the other switch device to which the cache content is transferred from the switch device stores the transferred data in the cache memory. Then, the data is synchronized with the cache memory of another switch device.

A control method for a switch device with a built-in cache having a data transfer function between switches according to a fourteenth aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with Data transfer control unit, and is configured to connect from an individual switch device to all other switch devices by an inter-switch path, and the cache control unit updates the data in the switch memory when the data in the cache memory is updated. When the transfer control unit is notified that the data has been updated, and the inter-switch data transfer control unit is notified by the cache control unit that the data in the cache memory has been updated, the storage I of the cache contents is notified.
D, time, transfer start address, transfer data size, and data contents are transferred to another switch device via the inter-switch path, and the switch-to-switch data transfer control unit of another switch device to which the cache contents have been transferred from the switch device Stores the transferred data in the cache memory and synchronizes the data with the cache memory of another switch device.

A control method for a cache built-in switch device with inter-switch data transfer function according to a fifteenth aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with And a data transfer control unit, which is configured to connect individual switch devices to adjacent switch devices by an inter-switch path, and the cache control unit transfers data between switches when the data in the cache memory is updated. When the control unit is notified that the data has been updated, and the inter-switch data transfer control unit is notified by the cache control unit that the data in the cache memory has been updated, when the data is updated, the storage I of the cache contents is stored.
D, time, transfer start address, transfer data size, and data contents are transferred to another switch device via the inter-switch path, and the switch-to-switch data transfer control unit of another switch device to which the cache contents have been transferred from the switch device Stores the transferred data in the cache memory and synchronizes the data with the cache memory of another switch device.

The control method for a cache built-in switch device with inter-switch data transfer function of the sixteenth aspect of the invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between switches that synchronize data with A data transfer control unit, and is configured to connect an individual switch device to another switch device by an inter-switch path, and the cache control unit controls inter-switch data transfer when the data in the cache memory is updated. When the cache controller updates the data in the cache memory, the inter-switch data transfer controller is notified that the data has been updated. Transfer the transfer start address, transfer data size, and data contents to another switch device via the inter-switch path,
The inter-switch data transfer control unit of another switch device to which the cache contents have been transferred from the switch device stores the transferred data in the cache memory and synchronizes the data with the cache memory of the other switch device.

According to a program of the seventeenth invention, in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, And between switch devices Scan by configured so as to be connected,
When the data in the cache memory is updated, the data transfer is performed via the inter-switch path with the different switch device, and the computer is caused to execute the process of synchronizing the data with the cache memory of the different switch device.

According to a program of the eighteenth invention, in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, From individual switch devices to other All switch devices are connected by an inter-switch path, and when the data in the cache memory is updated, the data is transferred via the inter-switch path between another switch device and the cache memory Causes the computer to perform the process of synchronizing.

According to a nineteenth aspect of the present invention, in a system in which a server and a storage device are connected to each other by using a plurality of switch devices, the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, Equipped with individual switching devices next to each other When the switch memory is configured to be connected by a switch path and the data in the cache memory is updated, the data is transferred via the switch path between the switch device and another switch device, and the data is synchronized with the cache memory of the other switch device. Causes the computer to execute the processing.

According to a twentieth aspect of the invention, in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, Equipped with a separate switch device The switch devices are configured to be connected by the inter-switch path, and when the data in the cache memory is updated, the data is transferred via the inter-switch path with another switch device, and the data is synchronized with the cache memory of the other switch device. Cause the computer to perform the processing.

According to a twenty-first aspect of the invention, in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and the storage device according to the transmission destination ID; A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, And between switch devices Scan by configured so as to be connected,
From the server, via the access path, using the switch device,
When a frame is transferred to the storage device, the command control unit analyzes the frame type and command code, and when it judges that the transferred frame is a read or write command, it notifies the cache control unit of the command ID, and the storage device When a frame is transferred between the server and the server, the cache control unit analyzes the frame type and the command ID, and if it determines that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is the storage ID, time,
When the transfer start address, the transfer data size, and the data are stored in the cache memory and it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set to the storage ID.
Then, the time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when the data in the cache memory is updated, the data is transferred via another switch device and the inter-switch path, and the other switch device Causes a computer to execute processing for synchronizing data with the cache memory.

According to a twenty-second aspect of the present invention, in a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address; A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, From individual switch devices to other All switch devices are connected by an inter-switch path, and when a frame is transferred from the server to the storage device by the switch device via the access path, the command control unit analyzes the frame type and command code. When the transferred frame is determined to be a read or write command, the cache control unit is notified of the command ID, and when the frame is transferred between the storage device and the server, the cache control unit specifies the frame type and the command ID. If it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, the time, the transfer start address,
The transfer data size and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the destination ID is the storage ID, the time, the transfer start address, The transfer data size and the data are stored in the cache memory, and when the data in the cache memory is updated, the data transfer is performed via the path between the switch device and the switch and the data is synchronized with the cache memory of the switch device. Let the computer run.

The program of the twenty-third aspect of the invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device is a cache memory for storing the frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and the storage device according to the transmission destination ID; A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, Equipped with individual switching devices next to each other When a frame is transferred from the server to the storage device by the switch device via the access path, the command control unit analyzes the frame type and the command code. When it is determined that the transferred frame is a read or write command, the command ID is notified to the cache control unit, and when the frame is transferred between the storage device and the server, the cache control unit analyzes the frame type and the command ID. However, when it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, the time, the transfer start address,
The transfer data size and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the destination ID is the storage ID, the time, the transfer start address, The transfer data size and the data are stored in the cache memory, and when the data in the cache memory is updated, the data transfer is performed via the path between the switch device and the switch and the data is synchronized with the cache memory of the switch device. Let the computer run.

A program according to a twenty-fourth aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address; A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, Equipped with a separate switch device Between switch device configured to be connected by a switch between paths, from the server, by the switch device via an access path, when the frame is transferred to the storage device, the command control unit frame type,
When the command code is analyzed and it is determined that the transferred frame is a read or write command, the command ID is sent to the cache control unit, and when the frame is transferred between the storage device and the server, the cache control unit When the type and command ID are analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and When the data is stored in the cache memory and it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and Store the data in cache memory and If the data of Sshumemori is updated, data is transferred via another switch device and switch between passes, to execute processing to the cache memory and the data synchronization for another switch device to the computer.

The program according to the twenty-fifth aspect of the invention is a system in which a server and a storage device are connected by using a plurality of switch devices, and the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address; A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, And between switch devices Scan by configured so as to be connected,
When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit updates the data in the cache memory from the cache control unit. When it is notified, the storage ID, time, transfer start address, transfer data size, and data content of the cache contents are transferred to another switch device via the inter-switch path, and the cache contents are transferred from the switch device. The transferred inter-switch data transfer control unit of the other switch device stores the transferred data in the cache memory and causes the computer to execute a process of synchronizing the data with the cache memory of the other switch device.

According to a twenty-sixth aspect of the invention, in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address; A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, From individual switch devices to other Between switching device and configured to connect the inter-switch path Te, when the cache controller is updating the data in the cache memory, to notify that performs data updating in the switch between the data transfer control unit,
When the data transfer control unit between switches is notified by the cache control unit that the data in the cache memory has been updated, the storage ID of the cache contents,
The time, transfer start address, transfer data size, and data contents are transferred to another switch device via the inter-switch path, and the inter-switch data transfer control unit of the other switch device to which the cache contents have been transferred from the switch device is The transferred data is stored in the cache memory, and the computer is caused to execute a process of synchronizing the data with the cache memory of another switch device.

The program according to the twenty-seventh aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device is a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, Equipped with individual switching devices next to each other Between switching device and configured to connect the switch between paths meet, when the cache controller is updating the data in the cache memory, to notify that performs data updating in the switch between the data transfer control unit,
When the data transfer control unit between switches is notified by the cache control unit that the data in the cache memory has been updated, the storage ID of the cache contents,
The time, transfer start address, transfer data size, and data contents are transferred to another switch device via the inter-switch path, and the inter-switch data transfer control unit of the other switch device to which the cache contents have been transferred from the switch device is The transferred data is stored in the cache memory, and the computer is caused to execute a process of synchronizing the data with the cache memory of another switch device.

According to a twenty-eighth aspect of the invention, in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, Equipped with a separate switch device When the cache control unit updates the data in the cache memory, the switch control unit notifies the switch data transfer control unit that the data has been updated, and the switch data transfer control is performed. When the cache controller updates the data in the cache memory, it is notified that the data has been updated.
The transfer start address, the transfer data size, and the data content are transferred to another switch device via the inter-switch path, and the inter-switch data transfer control unit of the other switch device to which the cache content is transferred from the switch device is transferred. The stored data is stored in the cache memory, and the computer is caused to execute a process of synchronizing the data with the cache memory of another switch device.

A control method for a cache built-in switch device with a switch-to-switch data transfer function according to a twenty-ninth aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with The data transfer control unit and the switch devices are configured to be connected by an inter-switch path, and when the data in the cache memory is updated, the first updated switch device starts and the next switch device successively. Data is transferred via the inter-switch path as a relay, and data is synchronized with the cache memory of another switch device.

A control method for a cache built-in switch device with a switch-to-switch data transfer function according to a thirtieth invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with The data transfer control unit is configured to connect each switch device to all other switch devices by an inter-switch path, and when the data in the cache memory is updated, the switch that is updated first Data is transferred from one device to the next switch device one after another through the inter-switch path, and data is synchronized with the cache memory of another switch device.

A control method for a cache built-in switch device with a data transfer function between switches according to a thirty-first invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with A data transfer control unit, the switch device is configured to connect between adjacent switch devices by an inter-switch path, and when the data in the cache memory is updated, the switch device updated first From the beginning, the data is transferred to the next switch device one after another through the inter-switch path, and the data is synchronized with the cache memory of another switch device.

A control method of a cache built-in switch device with a data transfer function between switches according to a thirty-second invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with Data transfer control unit, and is configured to connect from an individual switch device to another switch device by an inter-switch path, and when the data in the cache memory is updated, the switch device that is updated first First, the data is transferred to the next switch device one after another via the inter-switch path, and the data is synchronized with the cache memory of another switch device.

The control method for a switch device with a built-in cache having a data transfer function between switches according to a thirty-third aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the transmission destination ID, the frame type is analyzed, and if it is a command frame, the issuing storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with When a frame is transferred from the server to the storage device by the switch device via the access path via the access path, the command control unit When the frame type and command code are analyzed and it is determined that the transferred frame is a read or write command, a command ID is sent to the cache control unit.
Is notified and the frame is transferred between the storage device and the server, the cache control unit analyzes the frame type and the command ID, and the transferred frame is data for the read command notified from the command control unit. If it is determined that the sender ID is the storage ID,
The time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, When the time, the transfer start address, the transfer data size, and the data are stored in the cache memory and the data in the cache memory is updated, the first updated switch device starts and the next switch device relays between switches. Data is transferred via the path, and data is synchronized with the cache memory of another switch device.

According to a thirty-fourth aspect of the present invention, in a method of controlling a switch device with a built-in cache having a data transfer function between switches, in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device is a server and a storage device. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with A data transfer control unit, and is configured to connect each switch device to all other switch devices by an inter-switch path, and a frame is transferred from the server to the storage device by the switch device via the access path. When transferred, the command control unit analyzes the frame type and the command code, and when it judges that the transferred frame is a read or write command, it notifies the cache control unit of the command ID, and the storage device and the server communicate with each other. When the frame is transferred, the cache control unit analyzes the frame type and the command ID, and when the transferred frame is determined to be the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID. , Time, transfer start address, transfer data size, and data When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When the data is stored in the cache memory and the data in the cache memory is updated, data is transferred via the inter-switch path from the first updated switch device to the next switch device one after the other, and the data is transferred to another switch device. Synchronize data with cache memory.

A control method of a switch device with a cache having a data transfer function between switches according to a thirty-fifth aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with Data transfer control unit, and is configured to connect between adjacent switch devices from each switch device by an inter-switch path, and the frame is transferred from the server to the storage device by the switch device via the access path. In this case, the command control unit analyzes the frame type and the command code, and when it judges that the transferred frame is a read or write command, it notifies the cache control unit of the command ID, and the frame is transferred between the storage device and the server. When the data is transferred, the cache control unit analyzes the frame type and the command ID, and when it judges that the transferred frame is the data for the read command notified from the command control unit, sets the transmission source ID as the storage ID, Time, transfer start address, transfer data size, and data When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When the data is stored in the cache memory and the data in the cache memory is updated, data is transferred via the inter-switch path from the first updated switch device to the next switch device one after the other, and the data is transferred to another switch device. Synchronize data with cache memory.

The control method for a cache built-in switch device with inter-switch data transfer function according to the thirty-sixth aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with The data transfer control unit is configured to connect each switch device to another switch device by an inter-switch path, and a frame is transferred from the server to the storage device by the switch device via the access path. In this case, the command control unit analyzes the frame type and the command code, and when it judges that the transferred frame is a read or write command, it notifies the cache control unit of the command ID, and the frame is transferred between the storage device and the server. When transferred, the cache control unit analyzes the frame type and the command ID, and when it judges that the transferred frame is the data for the read command notified from the command control unit, the transmission source I
When D is the storage ID, the time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when the transferred frame is determined to be the data for the write command notified from the command control unit, the transmission destination When the ID is a storage ID, the time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when the data in the cache memory is updated, the first updated switch device starts and the next switch device successively. Data is relayed via the inter-switch path, and data is synchronized with the cache memory of another switch device.

A method of controlling a switch device with a built-in cache having a data transfer function between switches according to a thirty-seventh aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with A data transfer control unit, and the switch devices are configured to be connected by an inter-switch path. When the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit updates the data. When the cache controller updates the data in the cache memory, the inter-switch data transfer controller is notified of the update, and the storage ID of the cache contents, the time, the transfer start address, and the transfer data size. , The data contents are transferred via the inter-switch path from the first updated switch device to the next switch device one after the other, and the cache contents are transferred from the switch device to the inter-switch data of another switch device. The transfer control unit stores the transferred data in the cache memory, and the cache of another switch device is stored. Memory and to data synchronization.

A control method for a cache built-in switch device with inter-switch data transfer function according to a thirty-eighth aspect of the present invention is a system for connecting a server and a storage device by using a plurality of switch devices, wherein the switch device is a server or a storage device. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with Data transfer control unit, and is configured to connect from an individual switch device to all other switch devices by an inter-switch path, and the cache control unit updates the data in the switch memory when the data in the cache memory is updated. When the transfer control unit is notified that the data has been updated, and the inter-switch data transfer control unit is notified by the cache control unit that the data in the cache memory has been updated, the storage I of the cache contents is notified.
D, time, transfer start address, transfer data size, and data contents are relayed from the first updated switch device to the next switch device via the inter-switch path, and the contents of the cache are transferred from the switch device. The transferred inter-switch data transfer control unit of the other switch device stores the transferred data in the cache memory and synchronizes the data with the cache memory of the other switch device.

According to a thirty-ninth aspect of the present invention, in a method of controlling a switch device with a built-in cache having a data transfer function between switches, in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device is a server and a storage device. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with And a data transfer control unit, which is configured to connect individual switch devices to adjacent switch devices by an inter-switch path, and the cache control unit transfers data between switches when the data in the cache memory is updated. When the control unit is notified that the data has been updated, and the inter-switch data transfer control unit is notified by the cache control unit that the data in the cache memory has been updated, when the data is updated, the storage I of the cache contents is stored.
D, time, transfer start address, transfer data size, and data contents are relayed from the first updated switch device to the next switch device via the inter-switch path, and the contents of the cache are transferred from the switch device. The transferred inter-switch data transfer control unit of the other switch device stores the transferred data in the cache memory and synchronizes the data with the cache memory of the other switch device.

The control method for a switch device with a built-in cache having a data transfer function between switches according to the fortieth aspect of the invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with A data transfer control unit, and is configured to connect an individual switch device to another switch device by an inter-switch path, and the cache control unit controls inter-switch data transfer when the data in the cache memory is updated. When the cache controller updates the data in the cache memory, the inter-switch data transfer controller is notified that the data has been updated. Transfer start address, transfer data size, and data contents are relayed one after another from the first updated switch device to the next switch device via the inter-switch path,
The inter-switch data transfer control unit of another switch device to which the cache contents have been transferred from the switch device stores the transferred data in the cache memory and synchronizes the data with the cache memory of the other switch device.

According to a program of the forty-first invention, in a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, And between switch devices Scan by configured so as to be connected,
When the data in the cache memory is updated, the data is transferred via the inter-switch path, starting from the first updated switch device to the next switch device one after another.
A computer is caused to execute a process of synchronizing data with a cache memory of another switch device.

The program of the forty-second invention is a system in which a server and a storage device are connected by using a plurality of switch devices, and the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, From individual switch devices to other All switch devices are configured to be connected by an inter-switch path, and when the data in the cache memory is updated, the inter-switch paths are relayed one after another starting from the first updated switch device to the next switch device. The data transfer is performed via the computer, and the computer is caused to execute the process of synchronizing the data with the cache memory of another switch device.

The program of the forty-third aspect of the invention is a system in which a server and a storage device are connected by using a plurality of switch devices, wherein the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, Equipped with individual switching devices next to each other When it is configured to connect the matching switch devices with an inter-switch path, and when the data in the cache memory is updated, the first updated switch device is started and the next switch device is relayed one after another via the inter-switch path. Data transfer is performed by the computer, and the computer is caused to execute a process of synchronizing the data with the cache memory of another switch device.

The program of the forty-fourth invention is a system in which a server and a storage device are connected by using a plurality of switch devices, and the switch device comprises a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, Equipped with a separate switch device Switch devices are connected by an inter-switch path, and when the data in the cache memory is updated, the first updated switch device starts and the next switch device relays one after another via the inter-switch path. The computer is caused to execute a process of performing data transfer and synchronizing the data with the cache memory of another switch device.

A program according to the forty-fifth aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device is a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, And between switch devices Scan by configured so as to be connected,
From the server, via the access path, using the switch device,
When a frame is transferred to the storage device, the command control unit analyzes the frame type and command code, and when it judges that the transferred frame is a read or write command, it notifies the cache control unit of the command ID, and the storage device When a frame is transferred between the server and the server, the cache control unit analyzes the frame type and the command ID, and if it determines that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is the storage ID, time,
When the transfer start address, the transfer data size, and the data are stored in the cache memory and it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set to the storage ID.
Then, the time, transfer start address, transfer data size, and data are stored in the cache memory, and when the data in the cache memory is updated, the switch device that was updated first is relayed to the next switch device one after another. Data transfer is performed via the inter-switch path, and the computer is caused to execute a process of synchronizing the data with the cache memory of another switch device.

A program according to the forty-sixth aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and the storage device according to the transmission destination ID; A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, From individual switch devices to other All switch devices are connected by an inter-switch path, and when a frame is transferred from the server to the storage device by the switch device via the access path, the command control unit analyzes the frame type and command code. When the transferred frame is determined to be a read or write command, the cache control unit is notified of the command ID, and when the frame is transferred between the storage device and the server, the cache control unit specifies the frame type and the command ID. If it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, the time, the transfer start address,
The transfer data size and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the destination ID is the storage ID, the time, the transfer start address, When the transfer data size and data are stored in the cache memory and the data in the cache memory is updated, the data is transferred from the first updated switch device to the next switch device one after another through the inter-switch path. Then, the computer is made to execute the processing of synchronizing the data with the cache memory of the other switch device.

The program according to the forty-seventh aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, Equipped with individual switching devices next to each other When a frame is transferred from the server to the storage device by the switch device via the access path, the command control unit analyzes the frame type and the command code. When it is determined that the transferred frame is a read or write command, the command ID is notified to the cache control unit, and when the frame is transferred between the storage device and the server, the cache control unit analyzes the frame type and the command ID. However, when it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, the time, the transfer start address,
The transfer data size and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the destination ID is the storage ID, the time, the transfer start address, When the transfer data size and data are stored in the cache memory and the data in the cache memory is updated, the data is transferred from the first updated switch device to the next switch device one after another through the inter-switch path. Then, the computer is made to execute the processing of synchronizing the data with the cache memory of the other switch device.

The program according to the forty-eighth invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device is a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, Equipped with a separate switch device Between switch device configured to be connected by a switch between paths, from the server, by the switch device via an access path, when the frame is transferred to the storage device, the command control unit frame type,
When the command code is analyzed and it is determined that the transferred frame is a read or write command, the command ID is sent to the cache control unit, and when the frame is transferred between the storage device and the server, the cache control unit When the type and command ID are analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and When the data is stored in the cache memory and it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and Store the data in cache memory and When the data in the cache memory is updated, the data is transferred from the first updated switch device to the next switch device one after another through the inter-switch path, and the data is synchronized with the cache memory of another switch device. Causes the computer to execute.

A program according to the forty-ninth aspect of the invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device is a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, And between switch devices Scan by configured so as to be connected,
When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit updates the data in the cache memory from the cache control unit. When it is notified, the storage ID of the cache content, the time, the transfer start address, the transfer data size, and the data content start from the switch device that was first updated via the inter-switch path and continue to the next switch device. The switch-to-switch data transfer control unit of another switch device that has transferred the cache contents from the switch device stores the transferred data in the cache memory and synchronizes the data with the cache memory of the other switch device. Causes the computer to execute the processing.

The program of the fiftieth invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device is a cache memory for storing the frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, From individual switch devices to other Between switching device and configured to connect the inter-switch path Te, when the cache controller is updating the data in the cache memory, to notify that performs data updating in the switch between the data transfer control unit,
When the data transfer control unit between switches is notified by the cache control unit that the data in the cache memory has been updated, the storage ID of the cache contents,
The time, transfer start address, transfer data size, and data contents are relayed from the first updated switch device to the next switch device through the inter-switch path, and the cache contents are transferred from the switch device. Further, the inter-switch data transfer control unit of the other switch device stores the transferred data in the cache memory and causes the computer to execute a process of synchronizing the data with the cache memory of the other switch device.

The program of the fifty-first invention is a system in which a server and a storage device are connected by using a plurality of switch devices, wherein the switch device is a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, With individual switch devices next to each other Between switching device and configured to connect the switch between paths meet, when the cache controller is updating the data in the cache memory, to notify that performs data updating in the switch between the data transfer control unit,
When the data transfer control unit between switches is notified by the cache control unit that the data in the cache memory has been updated, the storage ID of the cache contents,
The time, transfer start address, transfer data size, and data contents are relayed from the first updated switch device to the next switch device through the inter-switch path, and the cache contents are transferred from the switch device. Further, the inter-switch data transfer control unit of the other switch device stores the transferred data in the cache memory and causes the computer to execute a process of synchronizing the data with the cache memory of the other switch device.

The program according to the fifty-second invention is a system in which a server and a storage device are connected by using a plurality of switch devices, and the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, Equipped with a separate switch device When the cache control unit updates the data in the cache memory, the switch control unit notifies the switch data transfer control unit that the data has been updated, and the switch data transfer control is performed. When the cache controller updates the data in the cache memory, it is notified that the data has been updated.
Transfer start address, transfer data size, and data contents are relayed via the inter-switch path from the first updated switch device to the next switch device one after the other, and the contents of the cache are transferred separately from the switch device. The inter-switch data transfer control unit of the switch device causes the computer to execute the process of storing the transferred data in the cache memory and synchronizing the data with the cache memory of another switch device.

A control method for a switch device with a built-in cache having a data transfer function between switches according to a fifty-third aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with The data transfer control unit and the switch devices are configured to be connected by an inter-switch path, and when the data in the cache memory is updated, the first updated switch device is all transferred to the remaining other switch devices. Data is transferred via the inter-switch path, and data is synchronized with the cache memory of another switch device.

The control method for a cache built-in switch device with inter-switch data transfer function according to the 54th aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the transmission destination ID, the frame type is analyzed, and if it is a command frame, the issuing storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with The data transfer control unit is configured to connect each switch device to all other switch devices by an inter-switch path, and when the data in the cache memory is updated, the switch that is updated first Data is transferred from the device to all the remaining other switch devices via the inter-switch path, and data is synchronized with the cache memory of the other switch device.

According to a 55th aspect of the present invention, there is provided a method of controlling a switch device with a built-in cache having a data transfer function between switches, wherein the switch device is a server and a storage device. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with When a frame is transferred from the server to the storage device by the switch device via the access path via the access path, the command control unit When the frame type and command code are analyzed and it is determined that the transferred frame is a read or write command, a command ID is sent to the cache control unit.
Is notified and the frame is transferred between the storage device and the server, the cache control unit analyzes the frame type and the command ID, and the transferred frame is data for the read command notified from the command control unit. If it is determined that the sender ID is the storage ID,
The time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, The time, transfer start address, transfer data size, and data are stored in the cache memory, and when the data in the cache memory is updated, all the switch devices that are updated first are sent to the remaining other switch devices via inter-switch paths. Data transfer is performed and data is synchronized with the cache memory of another switch device.

The control method for a switch device with a built-in cache having a data transfer function between switches according to a fifty-sixth aspect of the present invention is a system for connecting a server and a storage device by using a plurality of switch devices, wherein the switch device is a server or a storage device. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with A data transfer control unit, and is configured to connect each switch device to all other switch devices by an inter-switch path, and a frame is transferred from the server to the storage device by the switch device via the access path. When transferred, the command control unit analyzes the frame type and the command code, and when it judges that the transferred frame is a read or write command, it notifies the cache control unit of the command ID, and the storage device and the server communicate with each other. When the frame is transferred, the cache control unit analyzes the frame type and the command ID, and when the transferred frame is determined to be the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID. , Time, transfer start address, transfer data size, and data When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When the data is stored in the cache memory and the data in the cache memory is updated, data is transferred from the switch device that was updated first to all the remaining other switch devices through the inter-switch path, and the cache memory and data in the other switch device are transferred. Synchronize.

A method of controlling a switch device with a cache having a data transfer function between switches according to a fifty-seventh aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the transmission destination ID, the frame type is analyzed, and if it is a command frame, the issuing storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with A data transfer control unit, the switch devices are configured to be connected by an inter-switch path, and when the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit updates the data. When the cache controller updates the data in the cache memory, the switch-to-switch data transfer control unit is notified that the data has been updated. The storage ID of the cache contents, the time, the transfer start address, and the transfer data size. , The data content is transferred from the first updated switch device to the remaining other switch device via the inter-switch path, and the inter-switch data transfer control unit of the other switch device to which the cache content is transferred from the switch device is , Store the transferred data in cache memory,
Data is synchronized with the cache memory of another switch device.

The control method of a switch device with a cache having a data transfer function between switches according to a fifty-eighth aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices. Between the cache memory that stores the frames transferred between the servers, the switch control unit that transfers the frame to the corresponding server and the storage device by the destination ID, the frame type is analyzed, and if it is a command frame, the issue destination storage device ID , A command control unit that analyzes the data read address, a cache control unit that manages the data in the cache memory, and when the data in the cache memory is updated, the data is transferred to another switch device and the cache memory of the other switch device Between the switches to synchronize the data with Data transfer control unit, and is configured to connect from an individual switch device to all other switch devices by an inter-switch path, and the cache control unit updates the data in the switch memory when the data in the cache memory is updated. When the transfer control unit is notified that the data has been updated, and the inter-switch data transfer control unit is notified by the cache control unit that the data in the cache memory has been updated, the storage I of the cache contents is notified.
D, time, transfer start address, transfer data size, and data contents are all transferred from the first updated switch device to the remaining other switch device via the inter-switch path, and the cache contents are transferred from the switch device to the other transferred switch device. The inter-switch data transfer control unit of the switch device stores the transferred data in the cache memory and synchronizes the data with the cache memory of another switch device.

The program according to the fifty-ninth aspect of the invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device is a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, And between switch devices Scan by configured so as to be connected,
When the data in the cache memory is updated, data is transferred from the first updated switch device to all the remaining other switch devices via the inter-switch path, and the computer is instructed to synchronize the data with the cache memory of the other switch device. Let it run.

The program according to the 60th aspect of the present invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device is a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address; A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, From individual switch devices to other All switch devices are configured to be connected by an inter-switch path, and when the data in the cache memory is updated, data is transferred from the first updated switch device to all other remaining switch devices via the inter-switch path. Then, the computer is made to execute the processing of synchronizing the data with the cache memory of the other switch device.

The program according to the 61st invention is a system in which a server and a storage device are connected using a plurality of switch devices, wherein the switch device comprises a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, And between switch devices Scan by configured so as to be connected,
From the server, via the access path, using the switch device,
When a frame is transferred to the storage device, the command control unit analyzes the frame type and command code, and when it judges that the transferred frame is a read or write command, it notifies the cache control unit of the command ID, and the storage device When a frame is transferred between the server and the server, the cache control unit analyzes the frame type and the command ID, and if it determines that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is the storage ID, time,
When the transfer start address, the transfer data size, and the data are stored in the cache memory and it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set to the storage ID.
The time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when the data in the cache memory is updated, the inter-switch paths from the first updated switch device to all the other switch devices. The data transfer is performed via the computer, and the computer is caused to execute the process of synchronizing the data with the cache memory of another switch device.

According to a program of the 62nd invention, in a system in which a server and a storage device are connected using a plurality of switch devices, the switch device includes a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, From individual switch devices to other All switch devices are connected by an inter-switch path, and when a frame is transferred from the server to the storage device by the switch device via the access path, the command control unit analyzes the frame type and command code. When the transferred frame is determined to be a read or write command, the cache control unit is notified of the command ID, and when the frame is transferred between the storage device and the server, the cache control unit specifies the frame type and the command ID. If it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, the time, the transfer start address,
The transfer data size and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the destination ID is the storage ID, the time, the transfer start address, When the transfer data size and data are stored in the cache memory and the data in the cache memory is updated, data is transferred from the switch device that was updated first to all the remaining switch devices via the inter-switch path, and The computer is caused to execute a process of synchronizing data with the cache memory of the switch device.

The program of the 63rd invention is a system in which a server and a storage device are connected by using a plurality of switch devices, wherein the switch device is a cache memory for storing frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and storage device according to the transmission destination ID; and a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issuing destination storage device ID and the data read address. A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, And between switch devices Scan by configured so as to be connected,
When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit updates the data in the cache memory from the cache control unit. When this is notified, the storage ID of the cache content, the time, the transfer start address, the transfer data size, and the data content are all updated from the switch device that was first updated to the other switch device via the inter-switch path. The inter-switch data transfer control unit of another switch device that has transferred and has transferred the contents of the cache from the switch device stores the transferred data in the cache memory and synchronizes the data with the cache memory of the other switch device. To run.

The program of the sixty-fourth invention is a system in which a server and a storage device are connected by using a plurality of switch devices, and the switch device comprises a cache memory for storing the frames transferred between the server and the storage device. A switch control unit that transfers a frame to the corresponding server and the storage device according to the transmission destination ID; A cache control unit that manages data in the cache memory, and an inter-switch data transfer control unit that performs data transfer with another switch device when data in the cache memory is updated and synchronizes data with the cache memory of the other switch device, From individual switch devices to other Between switching device and configured to connect the inter-switch path Te, when the cache controller is updating the data in the cache memory, to notify that performs data updating in the switch between the data transfer control unit,
When the data transfer control unit between switches is notified by the cache control unit that the data in the cache memory has been updated, the storage ID of the cache contents,
The time, transfer start address, transfer data size, and data contents are all transferred from the switch device that was updated first to the other remaining switch device via the inter-switch path, and the switch device transfers the cache contents to another switch. The inter-switch data transfer control unit of the device stores the transferred data in the cache memory and causes the computer to execute a process of synchronizing the data with the cache memory of another switch device.

[0088]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a system showing an embodiment of a cache built-in switch device having a switch-to-switch data transfer function and a control method connected to a switch built-in cache device having a switch-to-switch data transfer function according to a first embodiment of the present invention. It is a block diagram.

FIG. 2 is a block diagram showing a switch device with built-in cache having a data transfer function between switches and a switch device with a built-in cache function for data transfer between switches according to the control method of the present invention.

The first embodiment of the present invention is shown in FIGS.
As shown in FIG. 2, in the system in which the server and the storage device are connected using a plurality of switch devices, the switch device A3 and the switch device B4 store the frames transferred between the server A1 or the server B2 and the storage device 5. The cache memory 12, the corresponding server A1 or server B2, and the storage device 5 depending on the destination ID.
A switch control unit 14 for performing frame transfer to the frame, a command control unit 13 for analyzing the frame type and analyzing the issue destination storage device ID and data read address when the frame is a command frame, and data management in the cache memory 12. It has a cache control unit 15 to perform, and an inter-switch data transfer control unit 16 that performs data transfer with another switch device when data in the cache memory 12 is updated and synchronizes data with the cache memory 12 of another switch device.

Next, the operation of the first embodiment of the present invention will be described in detail with reference to FIGS. 1, 2, 3, and 4.

FIG. 3 shows a switch device with a cache and a control method server having a data transfer function between switches according to the present invention.
It is a figure which shows the frame format of the command transferred between storage devices.

As shown in FIG. 3, the command frame format is composed of a header section and a data section. In the header section, all of the servers A1 or B2 and the storage apparatus 5 connected to the switch apparatus 5 are the respective apparatuses. Each has a unique device ID for identification, the transmission destination device ID of the frame is stored in the transmission destination ID 21, the transmission source device ID of the frame is stored in the transmission source ID 22, and the server A1 or the server B2 and the storage device 5 are stored. Source ID 22 of the identification information indicating the source of the transmission and the transmission destination I of the identification information indicating the destination of
D21, a frame type 23 such as a frame type 23 in which information for identifying a command frame or a data frame is stored, and each command so that the command can be identified when a plurality of commands are issued at the same time. Since the unique ID is stored and the command ID is present, for example, from the server A1 to the storage device 5, the A.D. Three read commands B and C are issued at the same time, and the data transfer from the storage device 5 is C,
Even if there are responses such as B and A in a different order from the command issuance order, the server A1 is configured with a command ID 24 that identifies a command for which data has been transferred. In addition, the data section includes a command code 25 indicating information indicating whether a command from the server to the storage device 5 is read (read) or write (write), and a read for a read or write command issued to the storage device 5. And a transfer start address 26 indicating a write start address
And a transfer data size 27 indicating the transfer data size for the read or write command.

FIG. 4 is a diagram showing a cached data format of a switch device with a built-in cache having a data transfer function between switches and a control method according to the present invention.

As shown in FIG. 4, the cache storage data format is the storage I indicating the identification information of the storage apparatus 5.
D31, time 32, transfer start address 33 of information, transfer data size 34 thereof, and data 35.

An embodiment of the present invention in a switch device using a fiber channel arbitrated loop (FC_AL) as a communication interface between a server and a storage will be described.

First, the operation of the method of storing data in the cache memory 12 will be described.
When a frame is transferred to the storage device 5 by the switch device A3 via the access path A6 or the switch device B4 via the access path B7, the command control unit 1
3 analyzes the frame type 23 and the command code 25, and when it judges that the transferred frame is a read or write command, it notifies the cache controller 15 of the command ID 24.

When a frame is transferred between the storage device 5 and the server A1, the cache control unit 15 analyzes the frame type 23 and the command ID 24, and the transferred frame is a read command notified from the command control unit 13. If it is determined that the data is for
D22 is the storage ID 31, time 32, transfer start address 33, transfer data size 34, and data 3
5 is stored in the cache memory 12.

The transferred frame is the command control unit 1
When it is determined that the data is data for the write command notified from 3, the storage ID 31 is set as the transmission destination ID 21, and the time 32, the transfer start address 33, the transfer data size 34, and the data 35 are stored in the cache memory 12.

If all the data is already filled in the cache memory 12, the oldest data at time 32 is erased and the latest data is stored in the cache memory 12.

Next, the operation of the data transfer method from the cache memory 12 to the server will be described. When a read command is issued from the server A1 to the storage device 5, the command control unit 13 determines the frame type within the frame. 23 and the command code 25 are analyzed, and when it is determined that the frame is a read command, the destination ID
21, the transfer start address 26, and the transfer data size 27 are notified to the cache control unit 15.

The cache control unit 15 searches the cache memory 12 for the data corresponding to the notified data, and if the data is present in the cache,
The data in the cache memory 12 is transmitted to the server A1, and the command control unit 13 is notified of the cache hit.

Upon being notified of the cache hit, the command control unit 13 stops the transfer of the read command to the storage apparatus 5 and reports the completion of the command to the server A1 instead of the storage apparatus 5.

If the corresponding data does not exist in the cache, the command control unit 13 is notified that a cache miss has occurred. When the command control unit 13 is notified of the cache miss, it issues a command to the storage device 5 as usual.

When a write command is issued from the server A1 to the storage device 5, the command controller 13
Is the frame type 23 and command code 2 in the frame
5 is analyzed, and when it is determined that the frame is a write command, the cache control unit 15 is notified of the command ID 24.

When a frame is transferred between the storage device 5 and the server A1, the cache control unit 15 analyzes the frame type 23 and the command ID 24, and the transferred frame is a write command notified from the command control unit 13. If the data is stored in the cache memory 12, the command control unit 13 is notified of the completion of the data transfer when all the data is completely stored in the cache memory 12.

When the command control unit 13 is notified of the completion of the data transfer, the command control unit 13 reports the completion of the command to the server A1 instead of the storage apparatus 5.

After that, the cache control unit 15 transfers the data to the storage apparatus 5 and completes the write command to the storage apparatus 5.

Next, the operation of the inter-switch data transfer method will be described. When the cache control unit 15 updates the data in the cache memory 12, it notifies the inter-switch data transfer control unit 16 that the data has been updated. . When the inter-switch data transfer control unit 16 is notified by the cache control unit 15 that the data in the cache memory 12 has been updated, the inter-switch data transfer control unit 16 transfers the cache contents to the switch device B4 via the inter-switch path 8. The contents of the cache transferred at this time are the storage ID 31, the time 32, the transfer start address 33, the transfer data size 34, and the data 35 shown in FIG. Since the storage ID 31 is used by a plurality of switch devices,
IDs of server A1, server B2, and storage device 5
Must be the same regardless of access path.

The inter-switch data transfer control unit 16 of the switch device B4 to which the cache contents are transferred from the switch device A3 stores the transferred data in the cache memory 12 in the switch device B4. Similar to the method of storing data in the cache memory 12, the storage means stores the cache memory 12 in a free area if there is a free space, erases the oldest data at time 32 if there is no free space, and transfers the transferred data. The cache is stored in the cache memory 12.

According to this method, when the content of the cache of a certain switch device is updated, the cache update data is transferred to another switch device and the same data is stored in the cache of another switch device. The contents of the cache of will always contain the same data. Therefore, even when data is transferred via another switch device, the latest data is stored in the cache memory 12, and the switch device A
3 or the access path A6 fails, the access path B7 is used to access the cache memory 12 of the switch device B4.
It becomes possible to use the data of.

Next, a second embodiment of the present invention will be described in detail with reference to FIG.

In the first embodiment of the present invention, the server 2
Although the description has been given of the configuration of one device, two switch devices, and one storage device, it is also possible to implement the configuration of N devices.

FIG. 5 shows, as an example, a configuration with three servers, three switch devices, and three storage devices. When the number of switch devices is three or more, each switch device A, switch device B, and switch device C has another switch device, and if switch device A and switch device B have inter-switch path AB9, The switch device B and the switch device C have an inter-switch path BC10, and the switch devices A and C have an inter-switch path AC11.

A cache controller 15 of a switch device
When the data in the cache memory 12 is updated, notifies the inter-switch data transfer control unit 16 that the data has been updated. When the inter-switch data transfer control unit 16 is notified from the cache control unit 15 that the data in the cache memory 12 has been updated, the inter-switch data transfer control unit 16 transfers the contents of the cache to each inter-switch path AB9 to another switch device and the switch. Transfer via the inter-path BC10 or the inter-switch path AC11.

The inter-switch data transfer control unit 16 of another switch device, to which the cache contents have been transferred from the switch device in which the data in the cache memory 12 has been updated, transfers the transferred data to the cache memory 1 in the switch device.
Store in 2.

According to this method, when the content of the cache of a certain switch device is updated, the cache update data is transferred to another switch device and the same data is stored in the cache of another switch device. The contents of the cache of will always contain the same data.

Further, the cache memory 1 of the switch device
As the data updating method of No. 2, as described above, instead of updating the cache data by transferring the contents of the cache from the switch device that firstly generated the update to all the remaining other switch devices, an update notification is issued first. The receiving switch device updates the cache data of its own switch device, and further notifies the other switch device of the update of the cache data, thereby sequentially updating the cache contents of the remaining other switch devices. There is also a method. If this sequential updating method is adopted, the inter-switch path does not need to be established between all the switch devices, and it is sufficient that the inter-switch path is established in a chain form between adjacent switch devices.

Even when the number of servers and storage devices is three or more, since the information in the cache has the storage ID 31, it is possible to determine which storage device the contents of the cache belong to.

[0121]

As described above, the first effect of the switch device with a built-in cache with a switch-to-switch data transfer function and the control method of the present invention is that a cache hit occurs even if the use of the switch device from the server is random. The probability is high.

The reason is that, when the content of the cache of a certain switch device is updated, the cache update data is transferred to another switch device and the same data is stored in the cache of another switch device, so that a plurality of switch devices can be used. This is because the cache always stores the same data, and which switch device is used to store the latest data in the cache memory.

The second effect is that the data read time is not delayed when the access path fails or the switch device fails.

The reason is that even if the storage device is connected via another new normal switch device that has not failed, if the cache content of a certain switch device is updated, the cache update data is sent to another switch device. Is transferred and the same data is stored in the cache of another switch device, the same data is always stored in the cache of multiple switch devices, and the data is transferred via another switch device. This is because the latest data is stored in the cache memory even in the case of.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a cache built-in switch device with a switch-to-switch data transfer function and a control method connected to a cache built-in switch device with a switch-to-switch data transfer function according to a first embodiment of the present invention. Is.

FIG. 2 is a block diagram showing a switch device with built-in cache having a data transfer function between switches of the present invention and a switch device with a built-in cache function for data transfer between switches of a control method.

FIG. 3 is a diagram showing a command frame format of a cache-equipped switch device with a switch-to-switch data transfer function and a control method according to the present invention.

FIG. 4 is a diagram showing a cache storage data format of a switch device with a cache having a data transfer function between switches and a control method of the present invention.

FIG. 5 is a system configuration diagram showing an embodiment of a cache built-in switch device with a switch-to-switch data transfer function and a control method connected to a cache built-in switch device with a switch-to-switch data transfer function according to a second embodiment of the present invention; Is.

FIG. 6 is a system configuration diagram in which a conventional cache built-in switch device is connected.

FIG. 7 is a block diagram showing a conventional switch device with a built-in cache.

[Explanation of symbols] 1 Server A 2 server B 3 Switch device A 4 Switch device B 5 Storage device 6 Access path A 7 Access pass B 8 switch path 9 Switch path AB 10 Switch path BC 11 Path between switches AC 12 cache memory 13 Command control section 14 Switch control unit 15 Cache control unit 16 Data transfer control unit between switches 21 Destination ID 22 sender ID 23 frame type 24 Command ID 25 Command code 26,33 Transfer start address 27,34 Transfer data size 31 Storage ID 32 time 35 data

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) G06F 15/16 645 G06F 15/16 645 15/177 682 15/177 682J

Claims (64)

[Claims] 1. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory A cache control unit that
An inter-switch data transfer control unit that transfers data with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device is provided, and the switch devices are connected by an inter-switch path. When the data in the cache memory is updated, the data transfer is performed via the inter-switch path with another switch device and the data is synchronized with the cache memory of the other switch device. Switch device with built-in cache. 2. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory A cache control unit that
When the data in the cache memory is updated, an inter-switch data transfer control unit that transfers data with another switch device and synchronizes the data with the cache memory of the other switch device is provided, and all the other switches from the individual switch devices are provided. When the data in the cache memory is updated by configuring the devices to be connected by the inter-switch path, data transfer is performed via the inter-switch path with another switch device, and the data is synchronized with the cache memory of the other switch device. A switch device with a built-in cache that has a data transfer function between switches. 3. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory A cache control unit that
An inter-switch data transfer control unit that transfers data to another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device, and the switch devices adjacent to each other When the data in the cache memory is updated, the data is transferred via the inter-switch path with another switch device, and the data is synchronized with the cache memory of the other switch device. A switch device with a built-in cache that features a data transfer function between switches. 4. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory A cache control unit that
An inter-switch data transfer control unit that transfers data with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device, and between each switch device and another switch device. Is configured to be connected by an inter-switch path, and when the data in the cache memory is updated, the data is transferred via the inter-switch path with another switch device, and the data is synchronized with the cache memory of the other switch device. A switch device with a built-in cache that has a data transfer function between switches. 5. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory A cache control unit that
An inter-switch data transfer control unit that transfers data with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device is provided, and the switch devices are connected by an inter-switch path. When the data in the cache memory is updated, the data transfer is performed via the inter-switch path with another switch device and the data is synchronized with the cache memory of the other switch device. Method of switch device with built-in cache. 6. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory A cache control unit that
When the data in the cache memory is updated, an inter-switch data transfer control unit that transfers data with another switch device and synchronizes the data with the cache memory of the other switch device is provided, and all the other switches from the individual switch devices are provided. When the data in the cache memory is updated by configuring the devices to be connected by the inter-switch path, data transfer is performed via the inter-switch path with another switch device, and the data is synchronized with the cache memory of the other switch device. And a method of controlling a switch device with a built-in cache having a data transfer function between switches. 7. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory A cache control unit that
An inter-switch data transfer control unit that transfers data to another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device, and the switch devices adjacent to each other When the data in the cache memory is updated, the data is transferred via the inter-switch path with another switch device, and the data is synchronized with the cache memory of the other switch device. A method for controlling a switch device with a built-in cache, which features a data transfer function between switches. 8. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory A cache control unit that
An inter-switch data transfer control unit that transfers data with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device, and between each switch device and another switch device. Is configured to be connected by an inter-switch path, and when the data in the cache memory is updated, the data is transferred via the inter-switch path with another switch device, and the data is synchronized with the cache memory of the other switch device. A method for controlling a switch device with a built-in cache having a data transfer function between switches. 9. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory A cache control unit that
An inter-switch data transfer control unit that transfers data with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device is provided, and the switch devices are connected by an inter-switch path. When a frame is transferred from the server to the storage device by the switch device via the access path, the command control unit analyzes the frame type and the command code, and the transferred frame is a read or write command. When the frame is transferred between the storage device and the server, the cache control unit analyzes the frame type and the command ID, and the transferred frame is transferred to the command control unit. With the data for the read command notified from Then, the sender ID is used as the storage ID, the time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and the transferred frame is the data for the write command notified from the command control unit. If it is determined that the destination ID is the storage ID, the time, the transfer start address, the transfer data size, and the data are stored in the cache memory. A method for controlling a switch device with a built-in cache having an inter-switch data transfer function, characterized in that data is transferred via a switch to synchronize data with a cache memory of another switch device. 10. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. When the frame is transferred from the server to the storage device by the switch device via the access path,
The command control unit analyzes the frame type and the command code, and if it judges that the transferred frame is a read or write command, it sends a command I to the cache control unit.
When D is notified and a frame is transferred between the storage device and the server, the cache control unit determines the frame type,
When the command ID is analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. Inter-switch data transfer characterized by storing in the cache memory, and when data in the cache memory is updated, data transfer is performed via a path between the switch and another switch device, and data is synchronized with the cache memory of the other switch device. Switch device with built-in cache Your way. 11. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of another switch device when the data in the cache memory is updated. Switch between adjacent switch devices from the device. When the frame is transferred from the server to the storage device by the switch device via the access path,
The command control unit analyzes the frame type and the command code, and if it judges that the transferred frame is a read or write command, it sends a command I to the cache control unit.
When D is notified and a frame is transferred between the storage device and the server, the cache control unit determines the frame type,
When the command ID is analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. Inter-switch data transfer characterized by storing in the cache memory, and when data in the cache memory is updated, data transfer is performed via a path between the switch and another switch device, and data is synchronized with the cache memory of the other switch device. Switch device with built-in cache Your way. 12. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory that stores frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of another switch device when the data in the cache memory is updated. From device to another switch Device to switch When the frame is transferred from the server to the storage device by the switch device via the access path, the command control unit analyzes the frame type and the command code, and the transferred frame is read or If it is determined that it is a write command, the command ID is sent to the cache control unit.
Is notified and the frame is transferred between the storage device and the server, the cache control unit analyzes the frame type and the command ID, and the transferred frame is data for the read command notified from the command control unit. If it is determined that the sender ID is the storage ID,
The time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, The time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when the data in the cache memory is updated, the data is transferred via the path between the switch device and the switch, and the cache memory of the switch device is changed. A method for controlling a switch device with a built-in cache having a data transfer function between switches, which is characterized by synchronizing data with the switch. 13. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of the other switch device when the data in the cache memory is updated. Are connected by a path between switches. When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit updates the cache memory data from the cache control unit. If you are notified that it has been updated, the storage ID of the cache content, the time,
The transfer start address, the transfer data size, and the data content are transferred to another switch device via the inter-switch path, and the inter-switch data transfer control unit of the other switch device to which the cache content is transferred from the switch device is transferred. A method for controlling a switch device with a built-in cache having a data transfer function between switches, characterized in that the data is stored in a cache memory and is synchronized with the cache memory of another switch device. 14. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of another switch device when the data in the cache memory is updated. Switch from device to all other switch devices. If the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit notifies the inter-switch data transfer control unit that the cache has been updated. When the control unit updates the data in the cache memory, when the update is notified, the storage ID of the cache content, the time, the transfer start address,
The transfer data size and data contents are transferred to another switch device via the inter-switch path, and the switch-to-switch data transfer control unit of the other switch device to which the switch device has transferred the cache contents caches the transferred data. A method for controlling a switch device with a built-in cache having a data transfer function between switches, which is stored in a memory and is synchronized with a cache memory of another switch device. 15. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch between adjacent switch devices from the device. If the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit notifies the inter-switch data transfer control unit that the cache has been updated. When the control unit updates the data in the cache memory, when the update is notified, the storage ID of the cache content, the time, the transfer start address,
The transfer data size and data contents are transferred to another switch device via the inter-switch path, and the switch-to-switch data transfer control unit of the other switch device to which the switch device has transferred the cache contents caches the transferred data. A method for controlling a switch device with a built-in cache having a data transfer function between switches, which is stored in a memory and is synchronized with a cache memory of another switch device. 16. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of another switch device when the data in the cache memory is updated. From device to another switch Device to switch When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated. When the data in the cache memory is updated, when the update is notified, the storage ID of the cache content, the time, the transfer start address, the transfer data size, and the data content are transferred to another switch device via the inter-switch path. The switch-to-switch data transfer control unit of another switch device to which the cache contents are transferred from the switch device stores the transferred data in the cache memory and synchronizes the data with the cache memory of the other switch device. Control method of switch device with built-in cache with data transfer function between switches . 17. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of the other switch device when the data in the cache memory is updated. Are connected by a path between switches. And a program for causing a computer to execute a process of synchronizing data with the cache memory of another switch device by performing data transfer via the inter-switch path with another switch device when the data of the cache memory is updated. 18. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. When the cache memory data is updated,
A program for causing a computer to execute a process of performing data transfer via a path between switches and another switch device and synchronizing data with a cache memory of the other switch device. 19. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch between adjacent switch devices from the device. When the cache memory data is updated,
A program for causing a computer to execute a process of performing data transfer via a path between switches and another switch device and synchronizing data with a cache memory of the other switch device. 20. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. From device to another switch Device to switch When the data in the cache memory is updated, the data transfer is performed via the path between the switch device and the switch, and the computer is caused to perform the process of synchronizing the data with the cache memory of the switch device. Program for. 21. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Are connected by a path between switches. When a frame is transferred from the server to the storage device by the switch device via the access path, the command control unit
When the command code is analyzed and it is determined that the transferred frame is a read or write command, the command ID is sent to the cache control unit, and when the frame is transferred between the storage device and the server, the cache control unit When the type and command ID are analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and When the data is stored in the cache memory and it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and Store the data in cache memory and If the data of Sshumemori is updated, data is transferred via another switch device and a switch between paths, the program for executing the processing for the cache memory and the data synchronization for another switch device to the computer. 22. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. When the frame is transferred from the server to the storage device by the switch device via the access path,
The command control unit analyzes the frame type and the command code, and if it judges that the transferred frame is a read or write command, it sends a command I to the cache control unit.
When D is notified and a frame is transferred between the storage device and the server, the cache control unit determines the frame type,
When the command ID is analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. A program for storing the data in the cache memory and, when the data in the cache memory is updated, transferring the data via the path between the switch device and the switch and synchronizing the data with the cache memory of the switch device in the computer. . 23. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch between adjacent switch devices from the device. When the frame is transferred from the server to the storage device by the switch device via the access path,
The command control unit analyzes the frame type and the command code, and if it judges that the transferred frame is a read or write command, it sends a command I to the cache control unit.
When D is notified and a frame is transferred between the storage device and the server, the cache control unit determines the frame type,
When the command ID is analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. A program for storing the data in the cache memory and, when the data in the cache memory is updated, transferring the data via the path between the switch device and the switch and synchronizing the data with the cache memory of the switch device in the computer. . 24. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of another switch device when the data in the cache memory is updated. From device to another switch Device to switch When the frame is transferred from the server to the storage device by the switch device via the access path, the command control unit analyzes the frame type and the command code, and the transferred frame is read or If it is determined that it is a write command, the command ID is sent to the cache control unit.
Is notified and the frame is transferred between the storage device and the server, the cache control unit analyzes the frame type and the command ID, and the transferred frame is data for the read command notified from the command control unit. If it is determined that the sender ID is the storage ID,
The time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, The time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when the data in the cache memory is updated, the data is transferred via the path between the switch device and the switch, and the cache memory of the switch device is changed. A program that causes a computer to execute the process of synchronizing data with. 25. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of the other switch device when the data in the cache memory is updated. Are connected by a path between switches. When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit updates the cache memory data from the cache control unit. If you are notified that it has been updated, the storage ID of the cache content, the time,
The transfer start address, the transfer data size, and the data content are transferred to another switch device via the inter-switch path, and the inter-switch data transfer control unit of the other switch device to which the cache content is transferred from the switch device is transferred. A program for causing a computer to execute a process of storing the stored data in a cache memory and synchronizing the data with the cache memory of another switch device. 26. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. If the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit notifies the inter-switch data transfer control unit that the cache has been updated. When the control unit updates the data in the cache memory, when the update is notified, the storage ID of the cache content, the time, the transfer start address,
The transfer data size and the data content are transferred to another switch device via the inter-switch path, and the switch-to-switch data transfer control unit of another switch device to which the cache contents are transferred from the switch device caches the transferred data. A program that causes a computer to execute a process of storing the data in a memory and synchronizing the data with a cache memory of another switch device. 27. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch between adjacent switch devices from the device. If the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit notifies the inter-switch data transfer control unit that the cache has been updated. When the control unit updates the data in the cache memory, when the update is notified, the storage ID of the cache content, the time, the transfer start address,
The transfer data size and the data content are transferred to another switch device via the inter-switch path, and the switch-to-switch data transfer control unit of another switch device to which the cache contents are transferred from the switch device caches the transferred data. A program that causes a computer to execute a process of storing the data in a memory and synchronizing the data with a cache memory of another switch device. 28. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. From device to another switch Device to switch When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit is notified by the cache control unit. When the data in the cache memory is updated, when the update is notified, the storage ID of the cache content, the time, the transfer start address, the transfer data size, and the data content are transferred to another switch device via the inter-switch path. Then, the inter-switch data transfer control unit of the other switch device, to which the cache contents have been transferred from the switch device, stores the transferred data in the cache memory and causes the computer to perform the process of synchronizing the data with the cache memory of the other switch device. A program to run. 29. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of the other switch device when the data in the cache memory is updated. Are connected by a path between switches. When the data in the cache memory is updated, data is transferred from the first updated switch device to the next switch device one after another through the inter-switch path, and the data is transferred to the cache memory of another switch device. A method for controlling a switch device with a built-in cache having a data transfer function between switches, characterized by synchronizing data. 30. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. When the cache memory data is updated,
An inter-switch data transfer function characterized in that data is transferred from the first updated switch device to the next switch device one after another through inter-switch paths, and data is synchronized with the cache memory of another switch device. Method of switch device with built-in cache. 31. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch between adjacent switch devices from the device. When the cache memory data is updated,
An inter-switch data transfer function characterized in that data is transferred from the first updated switch device to the next switch device one after another through inter-switch paths, and data is synchronized with the cache memory of another switch device. Method of switch device with built-in cache. 32. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of another switch device when the data in the cache memory is updated. From device to another switch Device to switch When the data in the cache memory is updated by configuring the connection via a path, data is transferred via the inter-switch path from the first updated switch device to the next switch device one after another. A method for controlling a switch device with a built-in cache having a data transfer function between switches, characterized by synchronizing data with a cache memory of the switch device. 33. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of the other switch device when the data in the cache memory is updated. Are connected by a path between switches. When a frame is transferred from the server to the storage device by the switch device via the access path, the command control unit
When the command code is analyzed and it is determined that the transferred frame is a read or write command, the command ID is sent to the cache control unit, and when the frame is transferred between the storage device and the server, the cache control unit When the type and command ID are analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and When the data is stored in the cache memory and it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and Store the data in cache memory and When the data in the cache memory is updated, transfer the data from the first updated switch device to the next switch device one after another through the inter-switch path and synchronize the data with the cache memory of another switch device. And a method of controlling a switch device with a built-in cache having a data transfer function between switches. 34. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. When the frame is transferred from the server to the storage device by the switch device via the access path,
The command control unit analyzes the frame type and the command code, and if it judges that the transferred frame is a read or write command, it sends a command I to the cache control unit.
When D is notified and a frame is transferred between the storage device and the server, the cache control unit determines the frame type,
When the command ID is analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When the data is stored in the cache memory and the data in the cache memory is updated, data is transferred via the inter-switch path from the first updated switch device to the next switch device one after the other, and the data is transferred to another switch device. A switch characterized by synchronizing data with a cache memory The method of Chi data forwarding function cache integrated switch device. 35. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch between adjacent switch devices from the device. When the frame is transferred from the server to the storage device by the switch device via the access path,
The command control unit analyzes the frame type and the command code, and if it judges that the transferred frame is a read or write command, it sends a command I to the cache control unit.
When D is notified and a frame is transferred between the storage device and the server, the cache control unit determines the frame type,
When the command ID is analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When the data is stored in the cache memory and the data in the cache memory is updated, data is transferred via the inter-switch path from the first updated switch device to the next switch device one after the other, and the data is transferred to another switch device. A switch characterized by synchronizing data with a cache memory The method of Chi data forwarding function cache integrated switch device. 36. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. From device to another switch Device to switch When the frame is transferred from the server to the storage device by the switch device via the access path, the command control unit analyzes the frame type and the command code, and the transferred frame is read or If it is determined that it is a write command, the command ID is sent to the cache control unit.
Is notified and the frame is transferred between the storage device and the server, the cache control unit analyzes the frame type and the command ID, and the transferred frame is data for the read command notified from the command control unit. If it is determined that the sender ID is the storage ID,
The time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, When the time, the transfer start address, the transfer data size, and the data are stored in the cache memory and the data in the cache memory is updated, the switch device that has been updated first and then the next switch device is relayed between switches. A method of controlling a switch device with a built-in cache having a data transfer function between switches, wherein data is transferred via a path and data is synchronized with a cache memory of another switch device. 37. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Are connected by a path between switches. When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit updates the cache memory data from the cache control unit. If you are notified that it has been updated, the storage ID of the cache content, the time,
Transfer start address, transfer data size, and data contents are relayed via the inter-switch path from the first updated switch device to the next switch device one after another, and the contents of the cache are transferred separately from the switch device. The switch-to-switch data transfer control unit of the switch device stores the transferred data in the cache memory and synchronizes the data with the cache memory of another switch device. Method. 38. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of another switch device when the data in the cache memory is updated. Switch from device to all other switch devices. If the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit notifies the inter-switch data transfer control unit that the cache has been updated. When the control unit updates the data in the cache memory, when the update is notified, the storage ID of the cache content, the time, the transfer start address,
The transfer data size and data contents are transferred via the inter-switch path from the first updated switch device to the next switch device one after another, and the contents of the cache are transferred from the switch device to another switch device. A method of controlling a switch device with a built-in cache having an inter-switch data transfer function, wherein the inter-switch data transfer control unit stores the transferred data in a cache memory and synchronizes the data with a cache memory of another switch device. 39. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch between adjacent switch devices from the device. If the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit notifies the inter-switch data transfer control unit that the cache has been updated. When the control unit updates the data in the cache memory, when the update is notified, the storage ID of the cache content, the time, the transfer start address,
The transfer data size and data contents are transferred via the inter-switch path from the first updated switch device to the next switch device one after another, and the contents of the cache are transferred from the switch device to another switch device. A method of controlling a switch device with a built-in cache having an inter-switch data transfer function, wherein the inter-switch data transfer control unit stores the transferred data in a cache memory and synchronizes the data with a cache memory of another switch device. 40. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. From device to another switch Device to switch When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit is notified by the cache control unit. When the data in the cache memory is updated, when the update is notified, the storage ID of the cache content, the time, the transfer start address, the transfer data size, and the data content are updated first through the switch path. Transfer data from one device to the next switch device is relayed one after another, and the inter-switch data transfer control unit of another switch device to which the contents of the cache have been transferred from the switch device stores the transferred data in the cache memory, Data between switches characterized by synchronizing data with the cache memory of another switch device Method of controlling the data transfer function with a cache built-in switch device. 41. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Are connected by a path between switches. When the data in the cache memory is updated, the data is transferred from the first updated switch device to the next switch device one after another through the inter-switch path, and the data is transferred to the cache memory of another switch device. A program for causing a computer to execute a process of synchronizing data. 42. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of another switch device when the data in the cache memory is updated. Switch from device to all other switch devices. When the cache memory data is updated,
A program for causing a computer to execute a process of transferring data from the first updated switch device to the next switch device one after another through inter-switch paths and synchronizing the data with the cache memory of another switch device. 43. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of another switch device when the data in the cache memory is updated. Switch between adjacent switch devices from the device. When the cache memory data is updated,
A program for causing a computer to execute a process of transferring data from the first updated switch device to the next switch device one after another through inter-switch paths and synchronizing the data with the cache memory of another switch device. 44. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. From device to another switch Device to switch When the data in the cache memory is updated by configuring the connection via a path, data is transferred from the first updated switch device to the next switch device one after another via the inter-switch path, and A program for causing a computer to execute a process of synchronizing data with a cache memory of a switch device. 45. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Are connected by a path between switches. When a frame is transferred from the server to the storage device by the switch device via the access path, the command control unit
When the command code is analyzed and it is determined that the transferred frame is a read or write command, the command ID is sent to the cache control unit, and when the frame is transferred between the storage device and the server, the cache control unit When the type and command ID are analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and When the data is stored in the cache memory and it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and Store the data in cache memory and When the data in the cache memory is updated, the data is transferred from the first updated switch device to the next switch device one after another through the inter-switch path, and the data is synchronized with the cache memory of another switch device. A program that causes a computer to execute. 46. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. When the frame is transferred from the server to the storage device by the switch device via the access path,
The command control unit analyzes the frame type and the command code, and if it judges that the transferred frame is a read or write command, it sends a command I to the cache control unit.
When D is notified and a frame is transferred between the storage device and the server, the cache control unit determines the frame type,
When the command ID is analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When the data is stored in the cache memory and the data in the cache memory is updated, data is transferred via the inter-switch path from the first updated switch device to the next switch device one after the other, and the data is transferred to another switch device. The process of synchronizing the data with the cache memory Program for causing a row. 47. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch between adjacent switch devices from the device. When the frame is transferred from the server to the storage device by the switch device via the access path,
The command control unit analyzes the frame type and the command code, and if it judges that the transferred frame is a read or write command, it sends a command I to the cache control unit.
When D is notified and a frame is transferred between the storage device and the server, the cache control unit determines the frame type,
When the command ID is analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When the data is stored in the cache memory and the data in the cache memory is updated, data is transferred via the inter-switch path from the first updated switch device to the next switch device one after the other, and the data is transferred to another switch device. The process of synchronizing the data with the cache memory Program for causing a row. 48. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of another switch device when the data in the cache memory is updated. From device to another switch Device to switch When the frame is transferred from the server to the storage device by the switch device via the access path, the command control unit analyzes the frame type and the command code, and the transferred frame is read or If it is determined that it is a write command, the command ID is sent to the cache control unit.
Is notified and the frame is transferred between the storage device and the server, the cache control unit analyzes the frame type and the command ID, and the transferred frame is data for the read command notified from the command control unit. If it is determined that the sender ID is the storage ID,
The time, the transfer start address, the transfer data size, and the data are stored in the cache memory, and when it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, When the time, the transfer start address, the transfer data size, and the data are stored in the cache memory and the data in the cache memory is updated, the first updated switch device starts and the next switch device relays between switches. A program that causes a computer to execute a process of transferring data via a path and synchronizing the data with a cache memory of another switch device. 49. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of the other switch device when the data in the cache memory is updated. Are connected by a path between switches. When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit updates the cache memory data from the cache control unit. If you are notified that it has been updated, the storage ID of the cache content, the time,
Transfer start address, transfer data size, and data contents are relayed via the inter-switch path from the first updated switch device to the next switch device one after the other, and the contents of the cache are transferred separately from the switch device. And a program for causing a computer to execute a process of storing the transferred data in a cache memory and synchronizing the data with the cache memory of another switch device. 50. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. If the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit notifies the inter-switch data transfer control unit that the cache has been updated. When the control unit updates the data in the cache memory, when the update is notified, the storage ID of the cache content, the time, the transfer start address,
The transfer data size and data contents are transferred via the inter-switch path from the first updated switch device to the next switch device one after another, and the contents of the cache are transferred from the switch device to another switch device. The inter-switch data transfer control unit is a program for causing a computer to execute a process of storing transferred data in a cache memory and synchronizing the data with the cache memory of another switch device. 51. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch between adjacent switch devices from the device. If the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit notifies the inter-switch data transfer control unit that the cache has been updated. When the control unit updates the data in the cache memory, when the update is notified, the storage ID of the cache content, the time, the transfer start address,
The transfer data size and data contents are transferred via the inter-switch path from the first updated switch device to the next switch device one after another, and the contents of the cache are transferred from the switch device to another switch device. The inter-switch data transfer control unit is a program for causing a computer to execute a process of storing transferred data in a cache memory and synchronizing the data with the cache memory of another switch device. 52. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. From device to another switch Device to switch When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit is notified by the cache control unit. When the data in the cache memory is updated, when the update is notified, the storage ID of the cache content, the time, the transfer start address, the transfer data size, and the data content are updated first through the switch path. Transfer data from one device to the next switch device is relayed one after another, and the inter-switch data transfer control unit of another switch device to which the contents of the cache have been transferred from the switch device stores the transferred data in the cache memory, Causes the computer to execute the process of synchronizing the data with the cache memory of another switch device. Program for. 53. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Are connected by a path between switches. When the data in the cache memory is updated, the data is transferred from the switch device that was updated first to all the remaining switch devices via the inter-switch path, and the data is synchronized with the cache memory of the other switch device. And a method of controlling a switch device with a built-in cache having a data transfer function between switches. 54. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. When the cache memory data is updated,
A cache built-in switch with inter-switch data transfer function characterized by performing data transfer from the first updated switch device to all other remaining switch devices via the inter-switch path and synchronizing the data with the cache memory of the other switch device. Device control method. 55. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of the other switch device when the data in the cache memory is updated. Are connected by a path between switches. When a frame is transferred from the server to the storage device by the switch device via the access path, the command control unit
When the command code is analyzed and it is determined that the transferred frame is a read or write command, the command ID is sent to the cache control unit, and when the frame is transferred between the storage device and the server, the cache control unit When the type and command ID are analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and When the data is stored in the cache memory and it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and Store the data in cache memory and When the data in the cache memory is updated, the data is transferred from the first updated switch device to all the remaining other switch devices through the inter-switch path, and the data is synchronized with the cache memory of the other switch device. A method of controlling a switch device with a cache having a data transfer function between switches. 56. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. When the frame is transferred from the server to the storage device by the switch device via the access path,
The command control unit analyzes the frame type and the command code, and if it judges that the transferred frame is a read or write command, it sends a command I to the cache control unit.
When D is notified and a frame is transferred between the storage device and the server, the cache control unit determines the frame type,
When the command ID is analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When the data is stored in the cache memory and the data in the cache memory is updated, data is transferred from the switch device that was updated first to all the remaining other switch devices through the inter-switch path, and the cache memory and data in the other switch device are transferred. Data between switches characterized by synchronization The method of transfer function cache integrated switch device. 57. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Are connected by a path between switches. When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit updates the cache memory data from the cache control unit. If you are notified that it has been updated, the storage ID of the cache content, the time,
The transfer start address, the transfer data size, and the data contents are transferred from the first updated switch device to the remaining other switch device via the inter-switch path, and the cache contents are transferred from the switch device to the other switch device. A method of controlling a switch device with a built-in cache having an inter-switch data transfer function, wherein the inter-switch data transfer control unit stores the transferred data in a cache memory and synchronizes the data with a cache memory of another switch device. 58. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of another switch device when the data in the cache memory is updated. Switch from device to all other switch devices. If the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit notifies the inter-switch data transfer control unit that the cache has been updated. When the control unit updates the data in the cache memory, when the update is notified, the storage ID of the cache content, the time, the transfer start address,
Transfer data size and data contents from the first updated switch device to the remaining other switch device via the inter-switch path, and transfer the cache contents from the switch device to the inter-switch data transfer of another switch device A control method of a switch device with a built-in cache having a data transfer function between switches, wherein the control unit stores the transferred data in a cache memory and synchronizes the data with a cache memory of another switch device. 59. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of the other switch device when the data in the cache memory is updated. Are connected by a path between switches. When the data in the cache memory is updated, the data is transferred from the first updated switch device to all remaining switch devices via the inter-switch path, and the data is synchronized with the cache memory of the other switch device. A program that causes a computer to execute. 60. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. When the cache memory data is updated,
A program for causing a computer to execute data transfer from an initially updated switch device to all remaining switch devices via an inter-switch path and to synchronize data with a cache memory of another switch device. 61. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit for performing data transfer with another switch device and synchronizing the data with the cache memory of the other switch device when the data in the cache memory is updated. Are connected by a path between switches. When a frame is transferred from the server to the storage device by the switch device via the access path, the command control unit
When the command code is analyzed and it is determined that the transferred frame is a read or write command, the command ID is sent to the cache control unit, and when the frame is transferred between the storage device and the server, the cache control unit When the type and command ID are analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and When the data is stored in the cache memory and it is determined that the transferred frame is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and Store the data in cache memory and When the data in the cache memory is updated, data is transferred from the switch device that was updated first to all remaining switch devices via the inter-switch path, and the computer executes the process to synchronize the data with the cache memory of another switch device. A program to let you. 62. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. When the frame is transferred from the server to the storage device by the switch device via the access path,
The command control unit analyzes the frame type and the command code, and if it judges that the transferred frame is a read or write command, it sends a command I to the cache control unit.
When D is notified and a frame is transferred between the storage device and the server, the cache control unit determines the frame type,
When the command ID is analyzed and it is determined that the transferred frame is the data for the read command notified from the command control unit, the transmission source ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When it is determined that the frame stored in the cache memory and transferred is the data for the write command notified from the command control unit, the transmission destination ID is set as the storage ID, and the time, the transfer start address, the transfer data size, and the data are set. When the data is stored in the cache memory and the data in the cache memory is updated, data is transferred from the switch device that was updated first to all the remaining other switch devices through the inter-switch path, and the cache memory and data in the other switch device are transferred. Let the computer perform the process of synchronizing Because of the program. 63. In a system in which a server and a storage device are connected using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And a switch-to-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Are connected by a path between switches. When the cache control unit updates the data in the cache memory, it notifies the inter-switch data transfer control unit that the data has been updated, and the inter-switch data transfer control unit updates the cache memory data from the cache control unit. If you are notified that it has been updated, the storage ID of the cache content, the time,
The transfer start address, the transfer data size, and the data contents are transferred from the first updated switch device to the remaining other switch device via the inter-switch path, and the cache contents are transferred from the switch device to the other switch device. The inter-switch data transfer control unit is a program for causing a computer to execute a process of storing transferred data in a cache memory and synchronizing the data with the cache memory of another switch device. 64. In a system in which a server and a storage device are connected by using a plurality of switch devices, the switch device corresponds to a cache memory for storing frames transferred between the server and the storage device and a destination ID. A switch control unit that transfers frames to the server and the storage device, a command control unit that analyzes the frame type and, if it is a command frame, analyzes the issue destination storage device ID and the data read address, and data management in the cache memory And an inter-switch data transfer control unit that performs data transfer with another switch device when the data in the cache memory is updated and synchronizes the data with the cache memory of the other switch device. Switch from device to all other switch devices. If the cache control unit updates the data in the cache memory, the inter-switch data transfer control unit notifies the inter-switch data transfer control unit that the cache has been updated. When the control unit updates the data in the cache memory, when the update is notified, the storage ID of the cache content, the time, the transfer start address,
Transfer data size and data contents from the first updated switch device to the remaining other switch device via the inter-switch path, and transfer the cache contents from the switch device to the inter-switch data transfer of another switch device The control unit is a program for causing the computer to execute a process of storing the transferred data in the cache memory and synchronizing the data with the cache memory of another switch device.