JPS63109560A - Command control system in file controller - Google Patents

Abstract

PURPOSE:To execute a command received from a channel device by a channel control part asynchronously in a device control part by adding information for designating the plural variations of the command to data set to a common memory. CONSTITUTION:The information for designating the plural variations of the command is added to the data set to the common memory SS3 so as to execute the command received from a channel device by a channel adapter CA1 asynchronously by a device adapter DA2. Thereby, a file controller in which the channel adapter CA1 and the device adapter DA2 are asynchronously operated without deteriorating a throughput to the file controller can be constituted.

Description

[Detailed Description of the Invention] [Summary] A channel control section and a device control section are independent,
Read data asynchronously via memory shared by the channel control unit and device control unit.

In a file control device that has the function of writing,
Add information (header) specifying multiple variations of the command to the data set in the shared memory,
This allows the device control unit to asynchronously execute commands that the channel control unit receives from the channel device.

[Industrial application field]

Is this invention a channel system? In a file control device in which an In section and a device control section are independent and have a function of asynchronously reading and writing data via a memory shared by the channel control section and the device control section, This invention relates to a command control method having variations in the following.

In conventional file control devices, one processor processes multiple ink interfaces such as channel interfaces and device interfaces, which forces the processing procedures to be sequential, which limits the improvement in processing efficiency. had reached.

In addition, every time a new disk device is manufactured, it is necessary to redesign all the corresponding file control devices, and in order to improve the design efficiency of file control devices, which are rapidly evolving, file control devices with new ideas are required. Ta.

In order to meet this demand, a $II? A file control device has been put into practical use that separates a module (CA) 1 for downloading data and a module (DA) 2 for providing a device interface.

Here, it controls the channel adapter interface and also controls the common bus (C-B
(us) 6 to transfer data to and from other modules.

The device adapter (OA) 2 controls the interface with the device, and also connects the common bus (C-BIJS) with the device.
) Data is transferred to and from other modules via 6.

A resource management unit (RM) 5 uses a table storage (TS) 4 to manage the resources of the entire file control device, that is, the status of control information and processing operations.

Even in a file control device configured in this way, as the recent trend toward faster channel devices progresses, the data transfer speed between the channel device and the channel adapter (CA) 1 will increase compared to the device adapter (DA) 2. As data transfer speeds with devices have become faster, it becomes necessary for channel adapter (CA) 1 and device adapter (DA) 2 to operate asynchronously.

Shared memory (SS) 3 is the channel adapter (C
A) ■ or device adapter (DA) 2 is a memory area used when data is transferred asynchronously.

By adopting such a configuration, a new file control device can be configured simply by replacing a certain module.

However, among the commands sent from the channel device to such a file control device, there are many variations (transformations) of one command (read or write). , l records, and if the variation information is to be managed by the table storage (TS) 4, the common bus (C-Bus) 6 will become congested.

Therefore, a control scheme is needed that is effective for such command variations.

[Prior art and problems to be solved by the invention] The above-mentioned FIG. 2 is a diagram showing an example of the configuration of a recent file control device.

In this way, in a file control device in which the channel adapter (CA) 1 and the device adapter (to D) are configured separately, the channel adapter (CA)
When 1 and device adapter (DA) 2 operate asynchronously, in the conventional method, as mentioned above, commands are set to table storage (TS) 4 and data are set to shared memory (SS) 3. .

The specific data transfer operation at this time will be explained below.

First, the channel adapter (CA) receives a data transfer (write) request from the channel device (CIIL).
1 recognizes it, it notifies the resource management unit (R?l) 5.

Resource management unit (RM) 5 is channel adapter (CA)
Based on the instruction, the channel adapter (CA) 1 instructs the command and data storage address to the
The data is set in shared memory (SS) 3, the command is set in table storage (TS) 4, and the resource management unit (R
? l) Notify 5 of the completion of the settings.

The resource management unit (R
When M) 5 recognizes it, it notifies the device adapter (DA) 2 that there has been an operation request from the channel device (CIIL).

Upon receiving the notification, the device adapter (DA) 2 stores the table storage (TS) according to instructions from the resource management unit (RM) 5. and shared memory (SS) 3, and performs data transfer (write) as instructed by the command.

Similarly, in the case of leads, the channel device (CII
The device adapter (
DA) 2, the device adapter (DA)
2, from table storage (TS) 4,
Read the command and based on the instructions of the command,
Start the device (DV).

When the device adapter (DA) 2 reads the read data from the device (DV), the device adapter (DA) 2 writes the read data to the address of the shared memory (SS) 3 instructed by the resource management unit (RM) 5. The end of the write operation is notified to the resource management unit (RM) 5.

The channel adapter (CA) completes the setting of this read data.
) 1, the read data is retrieved from the coexistence memory (SS) 3 based on instructions from the resource management unit (RM) 5 and transferred to the channel device (C) IL).

In this way, in the conventional method, commands are stored in table storage (TS) 4, and data is stored in shared memory (SS).
) 3, a data transfer operation was performed asynchronously between the channel adapter (CA) 1 and the device adapter (DA) 2 using a conventional method.

As mentioned above, table storage (TS) 4 is a storage device used to manage control information for the entire file control device, so storing user data here will reduce the user area. At the same time, there is a problem in that the table storage (TS) 4 does not appear to be a user-dedicated area from the user's perspective, and the shared memory (SS) 3 is provided as a user-dedicated data area.

However, if we adopt the control method of writing data to the shared memory (SS) 3 and writing commands to the table storage (TS) 4 as described above, in the case of commands with many variations as mentioned above, the code will be For each transfer, channel adapter (CA) 1. Or device adapter (DA) 2 is table storage (TS) 4
It is necessary to access the common bus (C-BUS)
There was a problem in that the usage rate of 6 increased and the throughput of the file control device did not increase.

In view of the above-mentioned conventional drawbacks, the present invention provides a device adapter (DA) for data transfer operation between a device and a channel device.
) and channel adapter independently. In a file control device that is controlled asynchronously, even when commands with many variations are sent from a channel device,
The purpose of this invention is to provide a command control method that does not reduce throughput in the file control device.

[Means for solving problems]

FIG. 1 is a diagram showing an example of the configuration of a command control method in a file control device of the present invention.

In the present invention, (1) the channel adapter (CA) 1 and the device adapter (OA) 2 are independent, and the channel adapter (CA) 1 and the device adapter (DA) 2 have a shared memory (SS). ) Read data asynchronously via 3.

When executing a command with multiple variations (transformations) in a file system '4'B device that has a write function, the variations of the above command are specified in the data set on the shared memory (SS) 3. A means for adding control information to the channel adapter (
CA) L or device adapter (DA) 2 adds control information indicating a variation of the above command along with data onto the shared memory CSS') 3, and the device adapter (DA) 2. Alternatively, the channel adapter (CA) 1 is configured to read the data and control information, and read and write data according to commands sent from the channel device.

(2) The control information added to the read and write data is configured to include a control (CTLF) section and control data specified by the control (CTLF) section.

[Effect]

That is, according to the present invention, a channel adapter (CA);
A file that is independent of the device adapter (DA) and has the function of asynchronously reading and writing data via the channel adapter (CA) and memory <SS> shared by the device adapter (DA). In the control device, information (header) specifying multiple variations of the command is added to the data set in the shared memory (SS).
This allows the device adapter (DA) to asynchronously execute commands received by the channel adapter (CA) from the channel device, without reducing the throughput to the file control device. Channel adapter (CA) and device adapter (
DA) has the effect of constructing a file control device that operates asynchronously.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

The above-mentioned FIG. 1 is a diagram showing an example of the configuration of the command control method in the file control device of the present invention, in which the data stored on the shared memory (SS) 3 includes a header section that indicates command variations. The additional means are those necessary to carry out the invention. In addition, throughout the diagram,
The same reference numerals indicate the same objects.

The command control method in the file control device of the present invention will be explained below with reference to FIG.

Even if the present invention is implemented, the channel adapter (CA) 1, the device adapter (DA) 2, and the resource management unit (RM
) 5 is omitted because it is not particularly different from the conventional method.Here, the file control device receives extended commands from the channel device (CHL), that is, commands with multiple variations. The explanation will focus on the operation when you do this.

In the present invention, (a) the file control device shown in the figure receives a command having a plurality of variations from a channel device (CIIL) not shown, and sends a command to a channel adapter (CA) l or a device adapter ( D
A) When the controller 2 sets data on the shared memory (SS) 3, control information (header) indicating a variation of the command is added to each data of the code.

= When the Pig command is a read command, the device adapter (DA) 2 stores the data and header in the shared memory (SS) in the format shown in (b) of this figure.
) 3, channel adapter (CA) 1 is
Data corresponding to the command from the channel device (CHL) is read from the shared memory (SS) 3 and transferred to the channel device (CIIL).

When the command is a write command, the channel adapter (CA) 1 stores the data and header in the shared memory (SS) in the format shown in FIG.
When the device adapter (OA) 2 reads the header from the shared memory (SS) 3, it recognizes the variation of the command and transfers data to the device according to the variation.

Next, the command control method of the present invention will be explained in more detail with reference to (b) and (C) of this figure.

As mentioned above, figure (b) shows the data format on the shared memory (SS) 2 for read-related commands, and the rllA or C0UNT J section of the header contains the home address (HA) or read data. The number of bytes is specified, and what is specified here is configured to be indicated by ``byte 0'' of the ``control (CTLF) J section.''

Transfer data in this format to a device adapter (DA)
2 picks up the receiver from a device (DV) not shown,
Write to the specified area of shared memory (SS) 3.

In this case, first, the "control (CTLr') 4 part is X'
When the home address (IIA) indicating 80' is recognized, only the above header part is written.

Next, when the RO (record O) data in which the [control (CTLF) 4 part shows X'40] is recognized, the header part, key part, and data part are written.

Continuing, when the Rn (record n) data in which the control (CTLF) 4 section indicates x'oo' is recognized, the header section, key section, and data section are written.

Channel adapter (CA) 1 is a channel device (CI)
After receiving a command from +1, ), the header corresponding to the command is read from the shared memory (SS) 3, and the data transfer (read) specified by the header is performed.

(c) The figure shows the shared memory (SS) for write commands.
) 2 shows the data format above, and in the rHA or C0UNT or DUMMYJ section of the header, is it the home address (HA) or the number of bytes of read data?

Or something else is indicated, and what is indicated is configured to be indicated by "byte 0" of the "control (CTLF) 4 part".

Transfer data in this format to a channel adapter (CA)
1 is received from a channel device (CHL), not shown, and is written to a predetermined area of the shared memory (SS) 3.

In this case, first, the "control (CTLF) 4 part is
When the home address (IIA) indicating 0' is recognized, only the header part is written.

Next, when the RO (record 0) data in which the "control (CTLF) 4 section indicates X"40'' is recognized, the header section, key section, and data section are read.

Continuing, the 4th part of "Control (CTLF)" is X'20',
When Rn (record n) data indicating X'IO' is recognized, the header section, key section, and data section are written.

After the seek operation is completed, the device adapter (DA) 2 reads the header from the shared memory (SS) 3, recognizes the contents of the command from the channel device (CIIL), and follows the command to the device (DV).
).

Thus, the present invention provides a channel adapter (CA),
In a file control device in which the device adapter (DA) is independent, the channel adapter (CA).

Or, when the device adapter (DA) loads data onto the shared memory (SS), it adds control information that instructs variations of the command as a header, and the device adapter (port A) or channel adapter (CA) )but,
The feature is that the header is read from the shared memory (SS) and the data transfer specified by the header is performed asynchronously.

〔Effect of the invention〕

As described above in detail, the command control method in the file control device of the present invention is based on the channel adapter (
CA) and a device adapter (DA) are independent, and a shared memory (SS) is shared with the wireless channel adapter (DA).
In a file control device that has the function of reading and writing data asynchronously, information (header) specifying multiple variations of the command is added to the data set in the shared memory (SS), and the channel adapter (
This allows the device adapter (DA) to asynchronously execute commands received from the channel device (CA), so the device adapter (DA) can execute commands received from the channel device without reducing the throughput to the file control device.
This has the effect of constructing a file control device that can operate asynchronously with the device adapter (DA) and the device adapter (DA).

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a configuration example of a command control method in a file control device of the present invention. FIG. 2 is a diagram showing an example of the configuration of a recent file control device. It is. In the drawing, 1 is a channel adapter (CA). 2 is a device adapter (DA). 3 is shared memory (SS). 4 is table storage (TS). 5 is the resource management unit (RM), 6 is the common bus (C-II
US). rllA or C0UNT J, r control (CT
LF) J, or “11Aor C0UNT or
DUMMYJ, , r control (CTLF) J is a header. are shown respectively. (4,) 1)-do thread command'('-L' (su), 5SXE=rifzoumant (b) article (mouth

Claims (2)

[Claims] (1) Channel control section (1) and device control section (2)
In a file control device having a function of reading and writing data asynchronously via a memory (3) shared by the channel control unit (1) and the device control unit (2), When executing a command having multiple variations sent from a channel device, means is provided for adding control information instructing the transformation of the command to the data set on the shared memory (3), and channel control is performed. The unit (1) or the device control unit (2) adds control information that instructs modification of the command to the shared memory (3) together with the data, and the device control unit (2) or the channel control unit (1) A command control method for a file control device, characterized in that the data and control information are read and data is read and written in accordance with commands sent from the channel device. (2) The control information added to the read and write data is configured to include a control (CTLF) section and control data specified by the control (CTLF) section. A command control method in the file control device according to item 1.