JP3307331B2 - Network file system data transfer method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a server, in particular,
It belongs to a file system data transfer method in a network having a peripheral device and a client.

[0002]

2. Description of the Related Art An example of a conventional network file system is described in Japanese Patent Application Laid-Open No. 8-328935. This conventional network file system includes a server computer, a client computer, a storage device, and an external storage device.

A conventional network file system having such a configuration operates as follows.

That is, a server computer is provided with a storage device for holding a remote procedure call transmitted from a client computer, and when the received remote procedure call is a request to write a file on an external storage device, By holding the call in the storage device and immediately returning a response to the requesting client computer, mapping the file I / O request held at a predetermined timing as an access request of the local file system of the server computer, A write request is processed asynchronously and as a local file system without causing the client computer to wait.

[0005]

However, the prior art has the following problems. The first problem is
The data to be I / O to the peripheral device needs to be transferred twice from the client to the server and from the server to the peripheral device, so the performance is significantly lower than I / O to the peripheral device directly from the server. That's what it means. The reason is that, in a client / server type network file system, when a client attempts to access data, the data must pass through the server once.

The second problem is that since the server needs to be provided with an I / O storage device, a new device that is not required for an I / O request from the server is required, which increases the cost. That's what it means. The reason is that I / O requests from clients are processed asynchronously.

A third problem is that the performance of a network file system is limited by the capabilities of a server.
That is, even if high-speed channels and peripheral devices are prepared, these performances cannot be fully utilized in many cases. The reason is that, in a client / server type network file system, when a client attempts to access data, the data must pass through the server once.

The present invention has been made in view of the above problems, and has as its object to improve the performance of a network file system, reduce costs, and utilize the performance of a high-speed peripheral device. Another object of the present invention is to provide a method for transferring data of a file system in a network having a server, a peripheral device, and a client.

[0009]

SUMMARY OF THE INVENTION The present invention has the following arrangement to solve the above-mentioned problems. The gist of the invention according to claim 1 is a method of transferring data of a file system in a network having a server (21), a peripheral device (13), and a client (20). Any peripheral device (13) is TP
The server (21) stores whether or not the T function is supported. When the I / O request issued from the client (20) is transferred to the peripheral device (13), the peripheral device (1) is used.
The peripheral device (13) having received the extended input / output command adds the address of the client (20) on the network viewed from 3) to the extended input / output command. Instead of performing a direct data transfer with the client (20). The gist of the invention described in claim 2 is that when a data transfer request (1) is passed from a user program to a file system management means (2), the file system management means (2) sends the data transfer request destination to the client (20). It is checked whether it is a peripheral device in the server or a device peripheral managed by the server (21). If the peripheral device is managed by the server (21), the file system management means (2) sets the TPT input / output management means (5 ), An identification number for uniquely identifying an input / output request, and an address of a memory to which data is to be transferred, and the TPT input / output management means (5) transmits the address to the TPT input / output management table (16). ) To hold this input / output request, and then the file system management means (2) performs: a) the file name of the file on the disk of the peripheral device (13); b) the file of the input / output start position. Communication control of server / client communication information consisting of offset and input / output size in file, c) reading from peripheral device or writing to peripheral device, d) address of client via exchange, e) identification number Means (3), instruct it to transfer it to the server (21), wait for a completion notification from the communication control means (3), and then the server (21)
The server / client communication information is received from the server / client communication information, and the communication control means (9) passes the server / client communication information to the file system management means (7). Confirm that the device is a peripheral device managed by the server,
The TPT input / output information is taken out, passed to the input / output management means (11), and waits until a completion notification is received from the input / output control means 11. The input / output control means (11) allows the peripheral device to decode the TPT input / output information. And an extension input / output instruction to be issued to the peripheral device (13) in order to include additional information called an address from the peripheral device (13) to the client (20). Item 1 is a data transfer method of a network file system. According to a third aspect of the present invention, when data is read from a peripheral device, the input / output control means (14) of the peripheral device (13) that has received the extended input / output command outputs the identification number, the size of the data, and the read data. The data is transmitted to the client (20), and when the data transmission is completed, a data transmission completion notification is transmitted to the input / output control means (11) of the server (21), and then the identification number, the data size, and the data are received. The input / output control means (6) of the client (20) passes the identification number to the TPT input / output management means (5), queries the memory address of the client (20) for storing the received data, (5) retrieves the corresponding memory address from the TPT input / output management table (16) using the identification number as a key, passes it to the input / output control means (6), and Means (6) stores the data received into its memory, TPT
The TPT input / output management means (5) notifies the input / output management means (5) of the completion of the storage in the memory, and further receives the notification, and the TPT input / output management means (2) notifies the file system management means (2) of the peripheral device (13). Characterized in that the reading operation is performed by notifying that the data reception from the CPU has been completed.
Or the data transfer method of the network file system described in 2. The gist of the invention described in claim 4 is that, when writing data to the peripheral device (13), the input / output control means (1) of the peripheral device (13) that has received the extended input / output command.
4) transmits the identification number and the data size to the client (20), waits until data is received from the client (20), and controls the input / output control means () of the client (20) which has received the identification number and the data size. 6)
Passes the identification number to the TPT input / output management means (5) and inquires of the memory address of the client (20) in which the data to be transmitted is stored, and the TPT input / output management means (5) uses the identification number as a key. TPT input / output management table (1
The corresponding address of the memory of the transmission source is extracted from 6) and passed to the input / output control means (6), and the input / output control means (6)
Transmits the data in the memory to the peripheral device (13),
Notifying the TPT input / output management means (5) that the transmission has been completed, the TPT input / output management means (5) having received this notification sends the file system management means (2) to the peripheral device (13). The input / output control means (14) of the peripheral device (13), which has notified that the data transmission has been completed, has received the data, sets the input / output control means (1) of the server (21).
4. The data transfer method of a network file system according to claim 1, wherein the notification is performed to 1). The gist of the invention according to claim 5 is that the peripheral device (13) after the read operation and the write operation.
The input / output control means (11) receiving the completion notification from
The completion of the corresponding input / output request with the peripheral device (13) is notified to the file system management means (7), and the file system management means (7) having received the completion notification transmits the completion notification via the communication control means (9). The completion of the input / output request is notified to the client (20), and the communication control means (3) of the client (20) receives the completion notification from the server (21). The file system management means (2) notifies the completion of the data transfer request (1) if the completion notification is received from the TPT input / output management means (5). 5. The method according to claim 1, wherein a write operation is performed by notifying a user program. The gist of the invention according to claim 6 is that the input / output control means (11) having received the completion notification from the peripheral device (13) after the read operation and the write operation has a corresponding input / output with the peripheral device (13). The completion of the output request is notified to the file system management means 7, and the file system management means (7) having received the notification of completion notifies the completion of the input / output request to the client (20) via the communication control means (9). Upon receiving the completion notification from the server (21), the communication control means (3) of the client (20) notifies the file system management means (2) of the completion if the input / output request is a waiting input / output request. And
The file system management means (2) notifies the user program of the completion of the data transfer request (1) when receiving the completion notification from the TPT input / output management means (5). 4. The data transfer method for a network file system according to any one of the above items 1 to 4.
The gist of the invention according to claim 7 is that, when data is read from the peripheral device (13), the file system management means (7) determines whether the data of the file to be input / output is continuous on the peripheral device (13). If the data is not continuous, the dividing means (18) issues an input / output request to the peripheral device (13) once from the input / output start position of the target file to a position where data is interrupted first, and the server ( 21) The input / output control means (14) of the peripheral device (13) which has received the extended input / output command from the input / output control means (11) outputs the identification number, the data size, the length up to the position where the data is interrupted, and the data size. And the read data is transmitted to the client (20), and when the data transmission is completed, a data transmission completion notification is sent to the input / output control unit of the server (21). The file system management means (7) which has sent to the stage (11) and received the completion notification from the input / output control means (11) of the server (21), executes the division means (1).
According to 8), the offset in the data is advanced by an amount corresponding to the size of the data that has just been read, and the length of the data from the position where the input / output is completed in the file to the position where the data is interrupted next is set. Output control means (11)
Sends an extended input / output instruction to the peripheral device (13), and performs this processing until the input / output size first passed from the client (20) is reached. When this size is reached,
The input / output control means (11) notifies the file system management means (7) that the reading from the peripheral device (13) has been completed, and, in parallel with the above processing, the identification number, the data size, and the offset in the data. The input / output control means (6) of the client (20) which has received the data passes the identification number and the offset in the data to the TPT input / output management means 5, and the TPT input / output management means (5) Management table (1
A value obtained by advancing the address obtained from 6) by the offset value in the data by the address calculating means (17) is passed to the input / output control means (6), and the input / output control means (6) And notifies the TPT input / output management means (5) of the completion of the storage in the memory. This processing is performed every time data is transmitted from the peripheral device (13). ) Interprets that the reception of all data has been completed when the total value of the size of the received data first reaches the size of the input / output requested from the client (20), and sends the data to the file system management means (2). 7. The data transfer method for a network file system according to claim 1, wherein a read operation is performed by notifying that data reception from the peripheral device (13) has been completed. Be in the law. The gist of the invention described in claim 8 is that when writing data to a peripheral device,
The file system management means (7) checks whether or not the area for writing the data of the file to be input / output is physically continuously secured on the peripheral device (13). According to (18), an input / output request is once issued to the peripheral device (13) from the input / output start position of the target file to the position where the area is first interrupted,
Offset value in data to TPT input / output information (0 at first)
Is set as the input / output size of the TPT input / output information, the length up to the position where the area is interrupted, the TPT input / output information is passed to the input / output control means (11), and the input / output control means of the server (21) is set. The input / output control means (14) of the peripheral device (13) which has received the extended input / output command from (11) transmits the identification number, the length to the position where the data is interrupted as the data size, and the offset in the data to the client (20). ), And waits until data is received from the client (20). On the other hand, the input / output control means (6) of the client (20) which has received the identification number, the data size, and the offset in the data transmits the TPT input / output. The identification number and the offset in the data are passed to the management means (5), and the TPT input / output management means 5 converts the address obtained from the TPT input / output management table (16) into the address calculation means (17). Pass the value component advances the value of the offset in the data input and output control means (6) by,
The input / output control means (6) transmits the data in the memory to the peripheral device (13), notifies the TPT input / output management means (5) that the transmission has been completed, and sends the data to the peripheral device (13). The input / output control means (14) of the server (2)
The file system management means (7), which has notified the input / output control means (11) of (1) and received the completion notification from the input / output control means (11), uses the dividing means (18) to allocate the size of the file for which writing has been completed. The offset in the data is advanced, and the length of the data from the position where the input / output is completed in the file to the position where the next area is interrupted is set, and the extended input / output command is again sent from the input / output control means (11). Is transmitted to the peripheral device (13), and this processing is performed every time a write request is sent from the server (21).
The TPT input / output management means (5) of (0) interprets that the reception of all data has been completed when the total value of the size of the transmitted data first reaches the size of the input / output requested from the client (20). Then, the file system management means (2) is notified that the data reception from the peripheral device (13) has been completed, and similarly, the input / output control means (1) of the server (21) is notified.
1) is performed first until the input / output size passed from the client (20) is reached, and when this size is reached, the peripheral device (1) is sent to the file system management means (7).
The method according to any one of claims 1 to 7, further comprising the step of notifying that the writing to (3) has been completed. The gist of the present invention is a network in which a server (21), a peripheral device (13), and a client (20) are connected to each other, wherein the client (20) is a file system management unit (2). ) And communication control means (3)
And a TPT input / output management means (5), an input / output control means (6), and a TPT input / output management table (16). The file system management means (2) receives a data transfer request from a user program. And the file name of the file existing in the peripheral device (13), the offset in the file of the I / O start position and the I / O size, and whether the data is read from the peripheral device (13) or written to the peripheral device. , Receiving the server / client communication information having the address of the client via the exchange and the identification number, notifying the communication control means (3) in order to transfer the information to the server (21). Waiting for a completion notification from the communication control means (3) and receiving the completion notification from the TPT input / output management means (5), notifies the user program of the completion of the data transfer request (1). When the input / output control means (6) receives the identification number and the data from the peripheral device (13), the input / output control means (6) inquires of the TPT input / output management means (5). The transfer or the transfer of the data in the memory to the peripheral device (13).
The registration to the input / output management table (16), the notification of the memory address corresponding to the given identification number to the input / output control means (6), and the completion notification to the file system management means (2) are performed. (21) includes a file system management means (7), a communication control means (9), and an input / output control means (11), wherein the file system management means (7) Server passed /
Identification number, file name, I / O from client communication information
Enter the offset and I / O size of the start position in the file, whether the data is read from the peripheral device (13) or written to the peripheral device (13), and input / output TPT input / output information having the address via the exchange of the client. Output control means (1
1) and waits for a completion notification from the input / output control means (11). The communication control means (9) passes the server / client communication information received from the client to the file system management means (7), and The client (20) is notified of the completion of the input / output request from the system management means (7), and the input / output control means (11)
Is the TP received from the file system management means (7)
Based on the T input / output information, the instruction is converted into an instruction that can be decoded by the peripheral device, and is issued to the peripheral device (13).
Notify the file system management means (7) of the completion notification of the input / output request from the device. Sent to the input / output control means (6),
Send to client (20) or client (2
When the reception of the data from 0) is completed, the server (21)
An input / output control means (14) for notifying completion to the network is provided. The gist of the invention according to claim 10 is that the client (20) issues an input / output request to the peripheral device (13) once from the input / output start position of the target file to a position where data is first interrupted. 18) and an address calculation means for calculating a value advanced by an offset value in the data.

That is, in the present invention, when an I / O request is issued from a client to a peripheral device, the data transfer is performed by directly transferring the I / O target data between the client and the peripheral device without passing through the server. It is intended to provide a configuration capable of improving the performance of a network file system by reducing overhead related to the above and reducing the use of resources such as a CPU and a main memory in a server.
This data transfer method is called Third-partytransfer (hereinafter TPT)
Abbreviated).

The server 21, the client 20, and the peripheral device 13 shown in FIG. 1 referred to in the embodiment of the present invention are configured as a star network. Server 21
Knows which client and which peripheral device support the TPT function, and when transferring an I / O request issued from the client 20 to the peripheral device, the client 20 Add an address on the network. This is called an extended input / output instruction. The peripheral device that has received the extended input / output command does not perform the data transfer with the server 21 but performs the client 20
And direct data transfer.

[0012] In this manner, efficient data transfer without a server in the network file system is enabled.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. (First Embodiment) As shown in FIG. 1, a network file system according to a first embodiment comprises a client 20, a server 21, an exchange 30, a peripheral device 13, and a communication line 12. Have.

The client 20, the server 21, and the peripheral device 13 are connected by an exchange 30, and the client 20 and the server 21 are also connected by a communication line 12.

The client 20 transmits a data transfer request 1
And file system management means 2 and communication control means 3
TPT input / output management means 5, input / output control means 6, TPT
An input / output management table 16 is provided.

When the data transfer request 1 is passed from the user program, the file system management means 2 determines the file name of the file existing in the peripheral device 13, the offset in the file of the I / O start position and the I / O size, the peripheral device Whether the data is read from the device or written to a peripheral device, the address of the client via the exchange, and the identification number (hereinafter, these are collectively referred to as server / client communication information. The server / client is abbreviated as SC). To transfer these information to the server 21,
It notifies the communication control means 3 and waits for the completion notification from the communication control means 3. Then, upon receiving the completion notification from the communication control means 3 and the TPT input / output management means 5, it notifies the user program of the completion of the data transfer request 1.

When the input / output control means 6 receives the identification number and the data from the peripheral device 13, the input / output control means 6 inquires the TPT input / output management means 5, and if there is a corresponding identification number, the data is transferred to the memory or stored in the memory. Is transferred to the peripheral device 13.

The TPT input / output management means 5 registers in the TPT input / output management table 16, notifies the input / output control means 6 of the memory address corresponding to the given identification number, and completes the file system management means 2. Make a notification.

The server 21 has a file system management means 7, a communication control means 9, and an input / output control means 11.

The file system management means 7 determines the identification number, the file name, the offset in the file of the I / O start position and the I / O size from the SC communication information passed from the communication control means 9, and reads from the peripheral device or not. Whether to write to the device and the address of the client via the exchange
(Hereinafter, these are referred to as TPT input / output information) to the input / output control unit 11 and wait for a completion notification from the input / output control unit 11.

The communication control means 9 transfers the SC communication information received from the client to the file system management means 7. Further, it notifies the client 20 of the completion notification of the input / output request from the file system management means 7.

The input / output control means 11 converts the TPT input / output information received from the file system management means 7 into a command which can be interpreted by the peripheral device, and issues the command to the peripheral device 13. Further, it notifies the file system management means 7 of the completion notification of the input / output request from the peripheral device 13.

The peripheral device 13 has input / output control means 14.

The input / output control means 14 includes the input / output control means 1
The identification number or the identification number and the data are sent to the input / output control means 6 based on the information received from the server 1, and when the transmission to the client 20 or the reception of the data from the client 20 is completed, a completion notification is sent to the server 21.

The exchange 30 transfers data or information necessary for data transfer according to a designated address on the network.

(Operation of Entire Network File System) The operation of the entire network file system according to the first embodiment will be described in detail with reference to FIG.

When the data transfer request 1 is passed from the user program to the file system management means 2, the file system management means 2 determines whether the data transfer request destination is a peripheral device in the client 20 or a device peripheral managed by the server 21. Confirm. If the peripheral device is managed by the server 21, the following process is performed. The file system management means 2 passes the identification number for uniquely identifying the input / output request and the address of the memory to which the data is to be transferred to the TPT input / output management means 5. The TPT input / output management means 5 registers this in the TPT input / output management table 16 and holds this input / output request.

Next, the file system management means 2 includes: a) the file name of the file on the disk of the peripheral device 13; b) the offset in the file at the input / output start position and the input / output size (data size); The SC communication information consisting of d) the address of the client via the exchange, and e) the identification number is passed to the communication control means 3 and is instructed to be transferred to the server 21. Communication control means 3
Wait for the completion notification from.

After the above, the server 21 is connected to the client 2
0, the communication control means 9 receives the SC communication information from S.
-C Pass the communication information to the file system management means 7.

The file system management means 7 checks the contents of the SC communication information, and if the peripheral device is managed by the server, extracts the TPT input / output information from the SC communication information,
It is passed to the input / output management unit 11 and waits until a completion notification is received from the input / output control unit 11.

Next, the input / output control means 11 converts the TPT input / output information into a command which can be decoded by the peripheral device, and issues the command to the peripheral device 13. This command is transmitted from the peripheral device 13 to the client 20 in comparison with a normal command to the peripheral device.
This is called an extended input / output instruction because it includes additional information such as an address to the address.

(Read / Write Operation) Next, 1) when data of a specified file in the peripheral device 13 is read into the memory in the client 20, 2) data in the memory in the client 20 is read A case where data is written to is described.

(Read Operation) 1) When reading data from a peripheral device, the input / output control means 14 of the peripheral device 13 which has received the extended input / output instruction
The identification number, the size of the data, and the read data are transmitted to the client 20. When the data transmission is completed, a data transmission completion notification is sent to the input / output control means 11 of the server 21.

Next, the identification number, the data size, and the input / output control means 6 of the client 20 which has received the data
Passes the identification number to the TPT input / output management means 5 and inquires the address of the memory of the client 20 for storing the received data.

The TPT input / output management means 5 fetches the address of the corresponding memory from the TPT input / output management table 16 using the identification number as a key and passes it to the input / output control means 6. Stores the received data to the TP
It notifies T input / output management means 5 that the storage in the memory has been completed.

Further, the TPT input / output management means 5 having received the notification notifies the file system management means 2 that the data reception from the peripheral device 13 has been completed.

(Write Operation) 2) When writing data to the peripheral device 13, the input / output control means 14 of the peripheral device 13 which has received the extended input / output command
Transmits the identification number and the data size to the client 20.
And wait until data is received from the client 20.

The input / output control means 6 of the client 20, which has received the identification number and the data size, passes the identification number to the TPT input / output management means 5 and inquires the address of the memory of the client 20 in which the data to be transmitted is stored.

The TPT input / output management means 5 takes out the address of the corresponding source memory from the TPT input / output management table 16 using the identification number as a key and passes it to the input / output control means 6. The data in the memory is transferred to the peripheral device 13.
To the TPT input / output management means 5
Notify to

Further, the TPT input / output management means 5 having received this notification notifies the file system management means 2 that the data transmission to the peripheral device 13 has been completed.

Then, the input / output control means 14 of the peripheral device 13 which has received the data notifies the input / output control means 11 of the server 21.

After 1) or 2), the input / output control means 11 receiving the completion notification from the peripheral device 13
The completion of the corresponding input / output request is notified to the file system management means 7.

The file system management means 7 which has received the completion notification notifies the client 20 of the completion of the input / output request via the communication control means 9.

When receiving the completion notification from the server 21, the communication control means 3 of the client 20 notifies the file system management means 2 of the completion if it is a waiting input / output request.

When receiving the completion notification from the TPT input / output management means 5, the file system management means 2 notifies the user program of the completion of the data transfer request 1.

(Flow of Read / Write Operation) Next, description will be made with reference to a flowchart. 2 and 3
9 shows the flow of data and notification in a time series when reading from the peripheral device 13 to the memory of the client 20 and when writing data on the memory of the client 20 to the peripheral device 13. Note that the reference numerals in FIGS. 2 and 3 are not the reference numerals indicating the components, but are the numbers indicating the following steps.

(Reading Operation) In the reading operation shown in FIG. 2, the file system management means 2 issues a request to read from the peripheral device 13 by the data transfer request 1 from the user program in the client 20.
(Step 1) After the registration in the TPT input / output management table 16, the SC communication information is transferred to the server 21 by the communication control means 3 and the completion notification is waited for (Step 2).

Next, in the server 21, the file system management means 7, which has received the SC communication information from the communication control means 9, issues an extended input / output command to the peripheral device 13 by the input / output control means 11 to complete the operation. Wait (step 3).

The peripheral device 13 that has received the extended input / output instruction
The input / output control means 14 transmits the identification number and the read data to the client 20 (step 4), and when the transmission is completed, sends a completion notification to the server 21 (step 6).

The input / output control means 6 of the client 20, which has received the identification number and the data, inquires of the storage destination address by the TPT input / output management means 5, and stores the received data in its memory (step 5).

The input / output control means 11 having received the completion notification from the peripheral device 13 notifies the completion of the corresponding input / output request with the peripheral device 13 to the file system management means 7, and receives the completion notification. 7 notifies the client 20 of the completion of the input / output request via the communication control means 9 (step 7).

The communication control means 4 of the client 20 which has received the completion notification notifies the file system management means 2, and the file system management means 2 transmits the data transfer request 1
Is notified to the user program (step 8).

In steps 1, 2 and 8 in FIG. 2, steps 501 to 506 shown in FIG. 5 are sequentially performed. FIG.
In step 5 of FIG. 6, steps 601 to 6 shown in FIG.
07 are sequentially performed. In steps 3 and 7 of FIG.
Steps 701 to 706 shown in FIG. In steps 4 and 6 of FIG. 2, steps 801 to 80 shown in FIG.
Step 7 is performed sequentially.

(Write Operation) In the case of the write shown in FIG. 3, the file system management means 2 issues a write request to the peripheral device 13 by the user program in the client 20 by the data transfer request 1 (step 1). After the registration in the TPT input / output management table 16, the SC communication information is transferred to the server 21 by the communication control means 3 to wait for the completion notification (step 2).

Next, in the server 21, the file system management means 7 having received the SC communication information from the communication control means 9 issues an extended input / output command to the peripheral device 13 by the input / output control means 11 to complete the operation. Wait (step 3).

The peripheral device 13 that has received the extended input / output instruction
Input / output control means 14 of the client 20
And wait until data is received from the client 20 (step 4).

The input / output control means 6 of the client 20, which has received the identification number, inquires the address where the data is stored by the TPT input / output management means 5, and transmits the data in the memory to the peripheral device 13 (step 5).

The input / output control means 14 of the peripheral device 13 which has received the data notifies the server 21 (step 6).

The input / output control means 11 which has received the completion notification from the peripheral device 13 notifies the completion of the corresponding input / output request with the peripheral device 13 to the file system management means 7 and receives the completion notification. 7 notifies the client 20 of the completion of the input / output request via the communication control means 9 (step 7). The communication control means 3 of the client 20, which has received the completion notification, notifies the file system management means 2 and
Notifies the user program of the completion of the data transfer request 1 (step 8).

In steps 1, 2 and 8 in FIG. 3, steps 501 to 506 shown in FIG. 5 are sequentially performed. FIG.
In step 5 of FIG. 6, steps 601 to 6 shown in FIG.
07 are sequentially performed. In steps 3 and 7 in FIG.
Steps 701 to 706 shown in FIG. In steps 4 and 6 of FIG. 3, steps 801 to 80 shown in FIG.
Step 7 is performed sequentially.

In the first embodiment, one client, one server, and one peripheral device are described. However, the number is not limited.

Since the data transfer method of the network file system according to the embodiment is configured as described above, the following effects can be obtained.

The first effect is that the performance of the network file system can be improved. The reason is that the data is directly transferred between the peripheral device and the client without going through the server, so that it is not affected by the CPU load of the server or the size of the secured memory.

The second effect is that memory and CPU resources of the server can be saved. The reason is that the data is transferred directly between the peripheral device and the client without going through the server, so there is no need to temporarily store the data to be transferred in the server's memory, and to secure or release such memory This is because there is no need to use a CPU for processing such as the above and processing for transferring data to the secured memory.

The third effect is that the performance of high-speed peripheral devices can be utilized. The reason is that the load on the server is reduced by the first effect, so that the performance of the peripheral device which affects the performance of the server can be utilized.

(Second Embodiment) A second embodiment of the present invention will be described in detail with reference to the drawings. In the case where the data of the file to be input / output on the peripheral device 13 in FIG. 4 is not written in a physically continuous area, the peripheral device 13 has a capability of inputting / outputting such data at a time. The case in which the terminal does not have this will be described. This embodiment is different from FIG. 1 in that the client 20 has an address calculation unit 17 and the server 21 has a division unit 18, and the server 21 divides an input / output request into a plurality of requests. Until the file system management means 7 of the server 21 receives the SC communication information, the process is the same as that of FIG. Also, 1) when data of a specified file in the peripheral device 13 is read into the memory in the client 20; 2)
The data on the memory in the client 20 is transferred to the peripheral device 13.
The case where data is written to the storage device will be described separately.

(Read Operation) 1) When reading data from a peripheral device, the file system management means 7 checks whether or not the data of the file to be input / output is continuous on the peripheral device 13.

If the data is not continuous, the dividing means 18 temporarily sends an I / O request to the peripheral device 1 from the input / output start position of the target file to the position where data is first interrupted.
Issue to 3. That is, the offset value in the data (initially 0) is added to the TPT input / output information, the length to the position where the data is interrupted is set as the input / output size of the TPT input / output information, and the TPT input / output information is input. It is passed to the output control means 11.

Then, similarly to FIG. 1, the input / output control means 14 of the peripheral device 13 which has received the extended input / output command from the input / output control means 11 of the server 21 determines the identification number and the data size until the data is interrupted. , The offset in the data, and the read data are transmitted to the client 20. When the data transmission is completed, a data transmission completion notification is sent to the input / output control means 11 of the server 21.

The input / output control means 1 of the server 21
File system management means 7 receiving the completion notification from 1
Is set by the dividing means 18 to advance the offset in the data by the size of the data that has just been read, and to set the length of the data from the position where the input / output is completed in the file to the position where the data is interrupted next. Then, the extended input / output command is transmitted from the input / output control unit 11 to the peripheral device 13 again.

This processing is first performed until the input / output size passed from the client 20 is reached. When the input / output size is reached, the input / output control means 11 causes the file system management means 7 to read from the peripheral device 13. Notify completion.

In parallel with the above, the identification number, the data size, the offset in the data, and the input / output control means 6 of the client 20 which has received the data send the identification number and the data in the data to the TPT input / output management means 5. Pass the offset.

Then, the TPT input / output management means 5 calculates the address obtained from the TPT input / output management table 16 into the address calculation means 17.
The input / output control means 6 passes the value advanced by the value of the offset in the data to the input / output control means 6, and stores the received data in the memory, and the TPT input / output management means 5 finishes storing the data in the memory. Notify that

This process is performed every time data is transmitted from the peripheral device 13, and the TPT input / output management unit 5 determines that the total value of the size of the received data has reached the size of the input / output requested first from the client 20. At this point, it is interpreted that the reception of all data has been completed, and notifies the file system management means 2 that the reception of data from the peripheral device 13 has been completed.

(Write Operation) 2) When writing data to a peripheral device, the file system management means 7 determines whether or not an area for writing data of a file to be input / output is physically continuous on the peripheral device 13. Find out if.

If they are not continuous, the dividing means 18 temporarily sends an I / O request to the peripheral device 13 from the input / output start position of the target file to the position where the area is first interrupted.
Issue to That is, the offset value in the data (initially 0) is added to the TPT input / output information, the length of the TPT input / output information is set as the length to the position where the area is interrupted, and the TPT input / output information is input. It is passed to the output control means 11.

Then, similarly to FIG. 1, the input / output control means 14 of the peripheral device 13 which has received the extended input / output command from the input / output control means 11 of the server 21 determines the identification number and the data size up to the position where the data is interrupted. And the offset in the data to the client 20, and waits until data is received from the client 20.

On the other hand, the input / output control means 6 of the client 20 which has received the identification number, the size of the data, and the offset in the data passes the identification number and the offset in the data to the TPT input / output management means 5.

Then, the TPT input / output management means 5 uses the address obtained from the TPT input / output management table 16
To the input / output control means 6, the input / output control means 6 transmits the data in the memory to the peripheral device 13, and indicates that the transmission has been completed.
Notify the TPT input / output management means 5.

The input / output control means 14 of the peripheral device 13 having received the data notifies the input / output control means 11 of the server 21.

The file system management means 7 having received the completion notification from the input / output control means 11
In this way, the offset in the data is advanced by the size of the data that has just been written, and the length of the data from the position where the I / O is completed in the file to the position where the next area breaks is set, and the I / O control is performed again. The extended input / output command is transmitted from the means 11 to the peripheral device 13.

This process is performed every time a write request is sent from the server 21. The TPT input / output management means 5 of the client 20 determines that the total value of the size of the transmitted data is equal to the size of the input / output requested first from the client 20. At this point, it is interpreted that the reception of all data has been completed, and notifies the file system management means 2 that the reception of data from the peripheral device 13 has been completed.

Similarly, the input / output control means 1 of the server 21
1 is performed until the input / output size first passed from the client 20 is reached, and when this size is reached, the file system management means 7 is notified that writing to the peripheral device 13 has been completed.

According to the file system transfer method according to the second embodiment, in addition to the effects of the file transfer system according to the first embodiment, the peripheral device 13 also performs such This has an effect that the present invention can be applied to a case where the user does not have the ability to perform input / output.

The number of the above-mentioned constituent members and the like are not limited to the above-described embodiment, and can be set to a number suitable for carrying out the present invention. In each drawing, the same components are denoted by the same reference numerals.

[0086]

Since the present invention is configured as described above, the following effects can be obtained. The first effect is that the performance of the network file system can be improved. The reason is that data is transferred directly between the peripheral device and the client without going through the server,
This is because it is not affected by the CPU load or the size of the secured memory.

The second effect is that memory and CPU resources of the server can be saved. The reason is that the data is transferred directly between the peripheral device and the client without going through the server, so there is no need to temporarily store the data to be transferred in the server's memory, and to secure or release such memory This is because there is no need to use a CPU for processing such as the above and processing for transferring data to the secured memory.

The third effect is that the performance of a high-speed peripheral device can be utilized. The reason is that the load on the server is reduced by the first effect, so that the performance of the peripheral device which affects the performance of the server can be utilized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a data transfer method of a network file system according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a reading operation of a data transfer method of the network file system shown in FIG.

FIG. 3 is a diagram showing a write operation of the data transfer method of the network file system shown in FIG. 1;

FIG. 4 is a configuration diagram of a data transfer method of a network file system according to a second embodiment of the present invention.

FIG. 5 is a flowchart showing steps 1, 2, and 8 of FIG. 2 and steps 1, 2, and 8 of FIG.

FIG. 6 is a flowchart showing Step 5 of FIG. 2 and Step 5 of FIG. 3;

FIG. 7 shows steps 3 and 7 in FIG. 2 and steps 3 and 7 in FIG.
It is a flowchart which shows.

FIG. 8 shows steps 4 and 6 in FIG. 2 and steps 4 and 6 in FIG.
It is a flowchart which shows.

[Explanation of symbols]

 1 Data transfer request 2 File system management means 3 Communication control means 4 Communication control means 5 TPT input / output management means 6 Input / output control means 7 File system management means 9 Communication control means 11 Input / output control means 12 Communication line 13 Peripheral device 14 Input Output control means 16 TPT input / output management table 17 Address calculation means 18 Division means 20 Client 21 Server 30 Switch

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 13/00 G06F 12/00 G06F 3/06 G06F 13/10

Claims (10)

(57) [Claims] 1. A server (21) and a peripheral device (13)
A data transfer method of a file system in a network having a client (20) and a client (20). The server (21) determines which client (20) and which peripheral device (13) support the TPT function. When the I / O request issued from the client (20) is transferred to the peripheral device (13), an address on the network of the client (20) viewed from the peripheral device (13) is added. The peripheral device (13) receiving the extended input / output instruction
Is a method of transferring data directly to a client (20) instead of to a server (21) when transferring data. 2. When a data transfer request (1) is passed from a user program to a file system management means (2), the file system management means (2) checks whether the data transfer request destination is a peripheral device in the client (20). The server (21) checks whether the device is in the vicinity of the device, and checks the server (2).
If the peripheral device is managed by 1), the file system management means (2) transfers the identification number for uniquely identifying the input / output request and the data to the TPT input / output management means (5). The address of the memory to be transferred is passed, and the TPT input / output management means (5) passes the address to the TPT input / output management table (1).
6) to hold this input / output request, and then the file system management means (2): a) the file name of the file on the disk of the peripheral device (13); b) the input / output start position Communication control of server / client communication information consisting of offset in file and input / output size, c) whether reading from peripheral device or writing to peripheral device, d) address of client via exchange, e) identification number Means (3), instruct it to transfer this to the server (21), wait for a completion notification from the communication control means (3), and then the server (21) sends the server / client from the client (20) Upon receiving the communication information, the communication control means (9) passes the server / client communication information to the file system management means (7), and Management means (7) checks the contents of the server / client communication information, if the server is a peripheral device that manages, retrieves the TPT input and output information from the server / client communication information, input and output management means (1
1), and waits until a completion notification is received from the input / output control means 11. The input / output control means (11) transmits the TPT input / output information from the peripheral device (13) to the client (2).
2. The network file system according to claim 1, wherein the extended input / output instruction is converted into an extended input / output instruction to include additional information called an address to the peripheral device, and the extended input / output instruction is issued to the peripheral device. Data transfer method. 3. When data is read from a peripheral device,
The input / output control means (14) of the peripheral device (13) that has received the extended input / output command transmits the identification number, the data size, and the read data to the client (20), and transmits the data when the data transmission is completed. Is sent to the input / output control means (11) of the server (21). Next, the identification number, the data size, and the input / output control means (6) of the client (20) which has received the data,
The identification number is passed to the T input / output management means (5), the memory address of the client (20) for storing the received data is queried, and the TPT input / output management means (5) uses the identification number as a key for the TPT input / output. The address of the corresponding memory is taken out from the management table (16) and passed to the input / output control means (6). The input / output control means (6) stores the received data in the memory, and stores the received data in the TPT input / output management means ( 5), the TPT input / output management means (5) having received the notification notifies the file system management means (2) of data reception from the peripheral device (13). 1 or 2 characterized in that the reading operation is performed by notifying the completion.
3. The data transfer method of a network file system according to item 1. 4. When writing data to the peripheral device (13), the input / output control means (14) of the peripheral device (13) which has received the extended input / output command sets the identification number and the data size to the client (20). To the client (2
0) until the data is received, and the client (2) receiving the identification number and data size
The input / output control means (6) of (0) passes the identification number to the TPT input / output management means (5), inquires the address of the memory of the client (20) in which the data to be transmitted is stored, (5) TPT using the identification number as a key
The address of the corresponding transmission source memory is taken out of the input / output management table (16) and passed to the input / output control means (6). The input / output control means (6) transmits the data of the memory to the peripheral device (13). The TPT input / output management means (5) notifies that the transmission has been completed to the TPT input / output management means (5). And the input / output control means (14) of the peripheral device (13) having received the data notifies the input / output control means (11) of the server (21). Claims 1 to 3
The method for transferring data of a network file system according to any one of the above. 5. After the read operation and the write operation, the input / output control means (11) receiving the completion notification from the peripheral device (13) notifies the completion of the corresponding input / output request with the peripheral device (13) to a file. File system management means (7) that notifies system management means (7) and receives the completion notification
Notifies the client (20) of the completion of the input / output request via the communication control means (9). When the communication control means (3) of the client (20) receives the completion notification from the server (21), If it is a waiting input / output request, the completion is notified to the file system management means (2), and the file system management means (2) receives the completion notification from the TPT input / output management means (5). The write operation is performed by notifying the user program of the completion of the data transfer request (1).
5. The data transfer method for a network file system according to any one of claims 4 to 4. 6. After the read operation and the write operation, the input / output control means (11) which has received the completion notification from the peripheral device (13) determines completion of the corresponding input / output request with the peripheral device (13). File system management means (7) that has notified the file system management means 7 and received the completion notification
Notifies the client (20) of the completion of the input / output request via the communication control means (9). When the communication control means (3) of the client (20) receives the completion notification from the server (21), If it is a waiting input / output request, the completion is notified to the file system management means (2), and the file system management means (2) receives the completion notification from the TPT input / output management means (5). 5. The data transfer method for a network file system according to claim 1, wherein the completion of the data transfer request (1) is notified to a user program. 7. When reading data from the peripheral device (13), the file system management means (7) checks whether the data of the file to be input / output is continuous on the peripheral device (13), If not, the dividing means (18)
From the input / output start position of the target file to the position where data is first interrupted, an input / output request is once issued to the peripheral device (13), and an extended input / output command is received from the input / output control means (11) of the server (21). The input / output control means (14) of the peripheral device (13) transmits the identification number, the length to the position where the data is interrupted as the data size, the offset in the data, and the read data to the client (20), When the data transmission is completed, a completion notification of the data transmission is sent to the input / output control means (11) of the server (21), and the file system management means ( 7) The dividing means (18) advances the offset in the data by the size of the data that has just been read, and sets the size of the data as input / output in the file. Is set from the position at which the data is completed to the position at which the data is interrupted, and the extended input / output command is transmitted again from the input / output control means (11) to the peripheral device (13). The process is performed until the input / output size passed from (20) is reached. When the input / output size is reached, the input / output control means (11) instructs the file system management means (7) to complete reading from the peripheral device (13). Notification, and the identification number,
Data size, offset in the data, and input / output control means (6) of the client (20) that received the data
Passes the identification number and the offset in the data to the TPT input / output management means 5, and the TPT input / output management means (5)
A value obtained by advancing the address obtained from the address by the offset value in the data by the address calculating means (17) is passed to the input / output control means (6), and the input / output control means (6) stores the received data in its memory. Then, it notifies the TPT input / output management means (5) that the storage in the memory has been completed, and performs this processing every time data is transmitted from the peripheral device (13).
T The input / output management means (5) interprets that the reception of all data has been completed when the total value of the size of the received data first reaches the size of the input / output requested from the client (20). 7. The network file system according to claim 1, wherein a read operation is performed by notifying the system management means (2) that data reception from the peripheral device (13) has been completed. Data transfer method. 8. When writing data to a peripheral device, the file system management means (7) determines whether an area for writing data of an input / output target file is physically continuously secured on the peripheral device (13). Check if it is not continuous, and if it is not continuous,
An I / O request is issued to the peripheral device (13) once from the input / output start position of the target file to the position where the area is first interrupted, and the offset value in the data to the TPT input / output information (initially 0)
Is set as the input / output size of the TPT input / output information, the length up to the position where the region is interrupted, and the TPT input / output information is passed to the input / output control means (11). The input / output control means (14) of the peripheral device (13) which has received the extended input / output command from (11) transmits the identification number, the length to the position where the data is interrupted as the data size, and the offset in the data to the client (20). ) And wait until data is received from the client (20), while the identification number,
The input / output control means (6) of the client (20) having received the data size and the offset in the data passes the identification number and the offset in the data to the TPT input / output management means (5). Sends the value obtained by advancing the address obtained from the TPT input / output management table (16) by the offset value in the data by the address calculation means (17) to the input / output control means (6), Transmits the data in the memory to the peripheral device (13), notifies the TPT input / output management means (5) that the transmission has been completed, and sends the data to the input / output control means (14) of the peripheral device (13) receiving the data. ) Is the input / output control means (1) of the server (21).
The file system management means (7) notified to 1), and received the completion notification from the input / output control means (11), advances the offset in the data by the size of the writing completed by the dividing means (18), and The length from the position where the input / output is completed in the file to the position where the area is interrupted next is set as the size of the file, and the extended input / output command is transmitted again from the input / output control means (11) to the peripheral device (13). This process is performed every time a write request is sent from the server (21), and the TPT input / output management means (5) of the client (20) first determines that the total value of the size of the transmitted data is At the time when the requested input / output size is reached, it is interpreted that all data has been received, and the file system management means (2) has completed data reception from the peripheral device (13). Notifies the door, likewise, the input-output control means the server (21) (11)
Is performed first until the input / output size passed from the client (20) is reached, and when this size is reached, the file system management means (7) is notified that the writing to the peripheral device (13) has been completed. Was characterized by
A data transfer method for a network file system according to claim 1. 9. A server (21) and a peripheral device (13)
And a client (20) connected to each other, the client (20) comprising: a file system management means (2); a communication control means (3); a TPT input / output management means (5); The file system management means (2) includes an input / output control means (6) and a TPT input / output management table (16).
File name of file existing in 3), file offset and I / O size of I / O start position, peripheral device (13)
Whether to read from or write to peripherals,
It receives server / client communication information having an address and an identification number of the client via the exchange, and notifies the communication control means (3) to transfer the information to the server (21). Waiting for the completion notification, upon receiving the completion notification from the communication control means (3) and the TPT input / output management means (5), notifies the user program of the completion of the data transfer request (1), and the input / output control means (6) When receiving the identification number and the data from the peripheral device (13), it inquires the TPT input / output management means (5), and if there is the corresponding identification number, transfers the data to the memory or reads the data on the memory. Transfer to the peripheral device (13), TPT input / output management means (5), TPT input / output management table (16)
To the input / output control means (6) of the memory address corresponding to the given identification number and the completion notification to the file system management means (2). Management means (7), communication control means (9), input / output control means (1
The file system management means (7) includes an identification number, a file name, an offset in a file of an I / O start position, and I / O based on server / client communication information passed from the communication control means (9). O size, whether to read from the peripheral device (13) or to write to the peripheral device (13), and pass TPT input / output information having an address of the client via the exchange to the input / output control means (11); Waiting for a completion notification from the input / output control means (11), the communication control means (9) transfers the server / client communication information received from the client to the file system management means (7), and the file system management means (7). ) From the client (2)
0), the input / output control means (11) converts the TPT input / output information received from the file system management means (7) into a command which can be decoded by the peripheral device, and issues the command to the peripheral device (13). Then, the completion notification of the input / output request from the peripheral device (13) is sent to the file system management means (7), and the peripheral device (13), based on the information received from the input / output control means (11), The identification number or the identification number and the data are sent to the input / output control means (6), and the client (2)
A network comprising input / output control means (14) for notifying the server (21) of completion upon transmission to the server (0) or reception of data from the client (20). 10. A dividing means (18) for issuing an I / O request to the peripheral device (13) once from the input / output start position of a target file to a position where data is interrupted first, 10. The network according to claim 9, further comprising address calculating means for calculating a value advanced by an offset value within the range.