JPH11312113A - Rough connection multiprocessor system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize shared file locking/unlocking control at low cost by executing message communication between plural processors via a disk array device. SOLUTION: Plural processors 1-1 to 1-4 are respectively provided with file management tables 2-1 to 2-4 for managing the locking/unlocking of a shared file, connecting information reading instructions for acquiring the operation states of respective processors 1-1 to 1-4 and message communication instructions for communicating respective messages such as a locking instruction message, an unlocking instruction message, a locking response message, and an unlocking response message. In the disk array device 3, a connection state information means 8 senses the operation states of the connected plural processors 1-1 to 1-4, based on the connecting information reading instruction, informs of a requesting processor of the sensed contents, and at the receiving of the message communication instructions, a message informing means 7 interrupts the processors in operating other than the communication source processor to send a message.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a loosely coupled multiprocessor system, and more particularly to a lock for exclusively controlling a shared file in a loosely coupled multiprocessor system in which a plurality of processors are loosely coupled via a disk array device. / Unlock control system.

[0002]

2. Description of the Related Art A prior art document which discloses a lock / unlock control method of a shared file in a conventional loosely coupled multiprocessor system is disclosed in Japanese Patent Application Laid-Open No. 62-1453.
No. 49, JP-A-05-073394, JP-A-05-342177, JP-A-08-335205
And JP-A-09-293055.

The methods disclosed in Japanese Patent Application Laid-Open Nos. 62-145349 and 08-335205 perform locking / unlocking of a shared file by communicating between processors through communication means. In particular, JP-A-6
In the system disclosed in Japanese Patent Application Laid-Open No. 2-145349, a lock manager of an operating system communicates between a plurality of processors via communication means to lock / unlock a shared file.

[0004] Further, the methods disclosed in JP-A-05-073394 and JP-A-09-293055 collectively manage shared files on a shared memory shared by a plurality of processors instead of communication means. Rock
This is to unlock.

Further, the method disclosed in Japanese Patent Application Laid-Open No. 05-342177 uses a file control device that reduces the load on the processor and controls locking / unlocking of the shared file at high speed. When it is confirmed that the shared file to be accessed by inquiring of the file control device is in the unlocked state, the shared file is instructed to be locked and the shared file is accessed.

[0006]

The first problem is that the cost of a loosely coupled multiprocessor system becomes high. The reason is described in JP-A-62-145349,
JP-A-05-342177 and JP-A-08-3
This is because in the method disclosed in Japanese Patent No. 35205, dedicated hardware such as a communication unit and a file control device must be added to perform lock control of a shared file.

A second problem is that the configuration of a loosely coupled multiprocessor system is limited. The reason is,
JP-A-05-073394 and JP-A-09-2
In the method of controlling the locking of a shared file using a shared memory shared between processors as disclosed in Japanese Patent No. 93055, when the processing capacity of the existing system is insufficient and a processor is added, the shared memory of the existing system becomes inefficient. This is because only usable processors can be added.

A first object of the present invention is to provide a low-cost, loosely coupled shared file lock / unlock control by performing message communication between processors via a disk array device. It is to provide a multiprocessor system.

A second object of the present invention is to provide a disk array device which enables message communication between connected processors and realizes low cost control of locking / unlocking of a shared file. is there.

[0010]

A loosely coupled multiprocessor system according to the present invention is a loosely coupled multiprocessor system in which a plurality of processors are loosely coupled via a disk array device. A file management table for managing unlocking, a connection information read command for acquiring operation statuses of a plurality of processors connected to the disk array device, and a lock instruction between a plurality of processors via the disk array device And a message communication instruction for performing message communication of a lock response message and an unlock response message, and wherein the disk array device is connected to the plurality of processors connected to the connection information read instruction. Working condition A connection state notifying means for notifying the requesting processor of the message and notifying the requesting processor, and a message communication means for interrupting a running processor other than the communication source processor in response to the message communication instruction. And performs message communication via the disk array device to control locking / unlocking of the shared file.

In the loosely coupled multiprocessor system of the present invention, message communication is performed between processors loosely coupled via a disk array device to control locking / unlocking of a shared file.

Further, in the disk array device of the present invention, in a disk array device for controlling a logical disk in which redundant data is added to data divided into a plurality of physical disks and recorded, the operation status of a connected processor is determined. A connection status notifying unit that obtains the operation statuses of a plurality of processors in response to a connection information read instruction to obtain and notifies the requesting processor, and a request source in response to a message communication instruction for message communication between processors. And a message communication unit for interrupting a message to a processor other than the above processor.

In the disk array device of the present invention, message communication can be performed between loosely coupled processors, and lock / unlock control of a shared file can be performed.

[0014]

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

FIG. 1 is a block diagram showing the configuration of a loosely coupled multiprocessor system according to one embodiment of the present invention. The loosely coupled multiprocessor system according to the present embodiment includes a plurality of processors 1-1, 1-2, 1-3, 1
-4 are loosely coupled via the disk array device 3.

Processors 1-1, 1-2, 1-3, 1-
4 has file management tables 2-1, 2-2, 2-3, and 2-4 for managing shared files in common, respectively.
Access shared files. The processor 1-
1, 1-2, 1-3, 1-4 are disk array devices 3
To the processors 1-1, 1-2, 1-3,
A connection information read command for acquiring the operation status of the processor 1-4, and a processor 1-
1, 1-2, 1-3, 1-4, and a message communication instruction for message communication of a lock instruction message and an unlock instruction message, and a lock response message and an unlock response message.

The disk array device 3 has a physical disk 6
A logical disk 6 for dividing data into -1, 6-2, 6-3, and 6-4 and adding redundant data for recording, and processors 1-1, 1-2, 1-3, and 1-4. An upper control unit 4 that receives the issued input / output command and transmits and receives input / output data, and an array control unit that controls an input / output operation of data to and from the logical disk 6 according to an input / output instruction instructed by the upper control unit 4. And 5.

The upper control unit 4 includes processors 1-1, 1-
A message communication unit 7 for interrupting a message to a processor other than the one receiving this instruction in response to a message communication instruction issued from 2, 1-3, 1-4; and processors 1-1, 1-2, 1-3 , 1-4 in response to the connection information read command issued from
2, 1-3, 1-4, and a connection status notifying means 8 for reporting the operating status (operating / stopped).

FIG. 2 is a diagram showing a format of a message transmitted and received between the processors 1-1, 1-2, 1-3 and 1-4 via the disk array device 3. The message is
"1" when processor 1 locks a shared file
An instruction 9 in which "0" is specified when unlocking,
In response to the lock or unlock of the instruction 9, the processor 1 sets “1” when permitting, sets “0” when rejecting, a logical disk number 11 indicating the access number of the logical disk 6, And a file number 12 for identifying a shared file recorded on the disk 6.

FIG. 3 shows processors 1-1, 1-2, 1-
FIG. 9 is a diagram showing connection information that is returned to the requesting processor by the connection state notifying unit 8 in response to the connection information read command from 3, 1-4. This connection information is stored in processor 1
Processor connection information 21, 22, 23, indicating that -1, 1-2, 1-3, 1-4 are operating or stopped.
24.

Referring to FIG. 4, the file management tables 2-1, 2-2, 2-3, and 2-4 include, for each shared file, lock information 30 indicating a locked / unlocked state of the shared file. , A file identifier 31 including a logical disk number, a file number, etc., a file start address 32 indicating the file start position of the shared file on the logical disk 6, a file size 33 indicating the area length of the shared file, Stores management information including file attributes 34 such as archive information indicating security updates and security information.

Referring to FIG. 5, message communication means 7
Is performed in the message communication command receiving step S101.
, A message receiving step S102, a processor connection information obtaining step S103, a processor stop determining step S104, and a message interrupting step S10.
5, a processor stop determination step S106, a message interrupt step S107, a processor stop determination step S108, and a message interrupt step S1.
09 and an end report step S110.

Referring to FIG. 6, the process of the connection status notifying means 8 is a connection information read command receiving step S201.
, Processor connection information creation step S202, processor connection information creation step S203, processor connection information creation step S204, processor connection information creation step S205, processor connection information transmission step S206, and end report step S207.

FIG. 7 is a sequence diagram showing a message communication operation for locking a shared file among the processors 1-1, 1-2, 1-3 and 1-4 via the disk array device 3. is there. In FIG. 7, the file management table 2 is used for the processor 1-1 to access the shared file.
-1 to confirm that it is in the unlocked state, and the processor connection information 21, 22,
23, 24, and the processors 1-2, 1-3, 1
4 shows an operation for locking the shared file after confirming that the shared file is operating.

Next, the operation of the loosely-coupled multiprocessor system according to the present embodiment thus configured will be described with reference to FIGS.

Assume that the processor 1-1 has transmitted a connection information read command to the disk array device 3.

In the host controller 4 of the disk array device 3, when the connection status notifying means 8 receives the connection information read command (step S201), the disk array device 3
Connected to the processors 1-1, 1-2, 1-
It is checked via the higher-level control unit 4 whether or not 3, 1-4 is operating or stopped, and processor connection information 21, 22, 2,
3 and 24 (steps S201 to S205), and transmits the created processor connection information 21, 22, 23 and 24 to the requesting processor 1-1 (step S20).
6) A completion report is sent to the processor 1-1 (step S207).

The processor 1-1 uses the received processor connection information 21, 22, 23, 24 to process the processor 1-1.
It is possible to know the operation status (operating / stopping) of 1, 1-2, 1-3, 1-4.

Thereafter, before issuing an input / output instruction for accessing the shared file, the processor 1-1 issues a message communication instruction and an instruction 9 for designating the lock and a logical disk 6 in order to lock the shared file. The lock instruction message including the logical disk number 11 and the file number 12 of the shared file is transmitted to the disk array device 3 (100).

In the upper control unit 4 of the disk array device 3, when the message communication unit 7 receives the message communication command and the lock instruction message from the processor 1-1 (steps S101 and S102), the disk communication unit 7 sends the disk array The processor connection information 21, 22, 23, and 24 of all the processors 1-1, 1-2, 1-3, and 1-4 connected to the device 3 are acquired (step S103), and the message of the lock instruction message is obtained. An interrupt (110, 120, 130) is issued to the active processors 1-2, 1-3, 1-4 (step S10).
5, S107, S109). If there is a stopped processor (Yes in steps S104, S106, and S108), the message communication unit 7 does not interrupt the message to the processor.

Running processors 1-2, 1-3, 1-
Upon completion of the message interrupt to the message processor 4, the message communication means 7 reports the end of the message communication instruction to the requesting processor 1-1 (140) (step S110).

The processors 1-2, 1-3, and 1-4 that have received the message interrupt of the lock instruction message can respond regardless of the response order, but for convenience of explanation, the processors 1-2, 1-3, and 1--4. Responds in the order of 4.

When the processor 1-2 receives the message interrupt (110) of the lock instruction message, the processor 1-2 stores the management information of the logical disk number 11 and the file number 12 specified by the message interrupt of the received lock instruction message in the file management table 2. If the lock information 30 is unlocked, the lock information 30 is locked on the file management table 2-2, and a lock response message in which lock permission is set in the response 10 is sent to the disk array by a message communication instruction. It is issued to the device 3 (150).

In the host controller 4 of the disk array device 3, when the message communication means 7 receives the message communication command and the lock response message (step S10).
1, S102), and obtains processor connection information 21, 22, 23, 24 from the connection state notification means 8 (step S102).
103), other running processors 1-1, 1-3, 1
-4, a message interrupt (160, 170, 180) of a lock response message is performed (step S10).
5, S107, S109), and sends an end report (190) to the processor 1-2 (step S110).

When the processor 1-3 receives the message interrupt (120) of the lock instruction message, the processor 1-3 stores the management information of the logical disk number 11 and the file number 12 designated by the message interrupt of the received lock instruction message in the file management table 2. If the lock information 30 is unlocked, the lock information 30 is locked in the file management table 2-3, and a lock response message in which a lock permission is set in the response 10 is sent to the disk array by a message communication instruction. It is issued to the device 3 (200).

In the host controller 4 of the disk array device 3, when the message communication means 7 receives the message communication command and the lock response message (step S10).
1, S102), and obtains processor connection information 21, 22, 23, 24 from the connection state notification means 8 (step S102).
103), other running processors 1-1, 1-2, 1
-4, a message interrupt (210, 220, 230) of a lock response message is performed (step S10).
5, S107, S109), and sends an end report (240) to the processor 1-2 (step S110).

When the processor 1-4 receives the message interrupt (130) of the lock instruction message, the processor 1-4 stores the management information of the logical disk number 11 and the file number 12 specified by the message interrupt of the received lock instruction message in the file management table 2. If the lock information 30 is unlocked, the lock information 30 is locked in the file management table 2-4, and a lock response message in which the lock permission is set in the response 10 is sent to the disk array by a message communication instruction. It is issued to the device 3 (250).

In the host controller 4 of the disk array device 3, when the message communication means 7 receives the message communication command and the lock response message (step S10).
1, S102), and obtains processor connection information 21, 22, 23, 24 from the connection state notification means 8 (step S102).
103), other running processors 1-1, 1-2, 1
-3, a message interrupt (260, 270, 280) of the lock response message is performed (step S10).
5, S107, S109), and sends an end report (290) to the processor 1-2 (step S110).

The processor 1-1 interrupts the message of the lock response message from all the other processors 1-2, 1-3 and 1-4 for which the connection information acquired in advance by the connection information read command is in operation. (160, 210,
260) until it receives a message interrupt (160, 210, 2) of all lock response messages.
If the lock is permitted in step 60), the shared file to be accessed is locked by setting the lock information 30 on the file management table 2-1 in the locked state, and the locked shared file is accessed for the disk array device 3. Issue an I / O instruction.

The processor 1-2 ignores the message interrupt (220, 270) of the lock response message and ignores it. The processor 1-3 ignores the message interrupt (170, 280) of the lock response message. 1-4 receives the message interrupt (180, 230) of the lock response message and ignores it.

When the access to the locked shared file is completed, the processor 1-1 issues an unlock instruction message for unlocking the instruction 9 to the disk array device 3 by a message communication instruction. Thereafter, the same processes (100) to (290) as in the case of the message communication command of the lock instruction message are performed, and the shared file is unlocked.

In the above embodiment, a loosely coupled multiprocessor system in which four processors 1-1, 1-2, 1-3, and 1-4 are connected to the disk array device 3 has been described as an example. It goes without saying that the number of processors constituting the loosely coupled multiprocessor system is not limited to four.

[0043]

The first effect is that a low-cost, loosely-coupled multiprocessor system can be provided. The reason is that message communication is performed between loosely coupled processors via a disk array device in order to lock a shared file, so that special hardware such as a file control device that locks / unlocks at high speed is used. This is because there is no need to add hardware.

The second effect is that a loosely coupled multiprocessor system can be configured even with heterogeneous processors running the same operating system. The reason is that communication means for high-speed communication between processors in order to lock a shared file or special hardware such as a shared memory that can be shared between processors and accessed at high speed is not required. This is because different processors can be loosely coupled.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a loosely coupled multiprocessor system according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a format of a message communicated between processors in the loosely coupled multiprocessor system according to the present embodiment;

FIG. 3 is a diagram showing processor connection information in the loosely coupled multiprocessor system according to the embodiment;

FIG. 4 is a diagram illustrating the contents of a file management table in FIG. 1;

FIG. 5 is a flowchart showing a process of a message communication unit in FIG. 1;

FIG. 6 is a flowchart showing a process of a connection state notifying unit in FIG. 1;

FIG. 7 is a sequence diagram showing a message communication operation for locking a shared file between processors via a disk array device in the loosely coupled multiprocessor system according to the present embodiment.

[Explanation of symbols]

1-1, 1-2, 1-3, 1-4 Processor 2-1, 2-2, 2-3, 2-4 File Management Table 3 Disk Array Device 4 Upper Control Unit 5 Array Control Unit 6 Logical Disk 6 -1, 6-2, 6-3, 6-4 Physical disk 7 Message communication means 8 Connection information notifying means 9 Instruction 10 Response 11 Logical disk number 12 File number 21, 22, 23, 24 Processor connection information 30 Lock information 31 File identifier 32 File start address 33 File size 34 File attribute

Claims (6)

[Claims] 1. A loosely coupled multiprocessor system in which a plurality of processors are loosely coupled via a disk array device, wherein the processor manages lock / unlock of a shared file, and the disk array device. Connection information read command for acquiring the operating status of a plurality of processors connected to a plurality of processors, a lock instruction message, an unlock instruction message, a lock response message, and an unlock response between the plurality of processors via the disk array device. A message communication command for message communication of a message, wherein the disk array device senses the operating status of a plurality of processors connected to the connection information read command and notifies the requesting processor of the operating status. Status notification means And a message communication means for interrupting a message to an active processor other than the communication source processor in response to the message communication instruction,
A loosely-coupled multiprocessor system wherein message communication is performed between the processors via a disk array device to control locking / unlocking of a shared file. 2. A message communicated between the processors according to the message communication instruction includes: an instruction to specify locking / unlocking of a shared file; and a response to set permission / denial of locking / unlocking of the instruction.
2. The loosely coupled multiprocessor system according to claim 1, comprising a logical disk number in which the shared file is recorded and a file number of the shared file. 3. The file management table according to claim 1, wherein the lock information indicating lock / unlock of the shared file, a file identifier of the shared file, a file start address of the shared file on the logical disk, a file size of the shared file, 2. The loosely coupled multiprocessor system according to claim 1, comprising a file attribute of the shared file. 4. When the message communication unit receives a message communication instruction and a message from a processor, the message communication unit acquires the operating status of the plurality of processors from the connection state notifying unit, and performs a message interrupt on the active processor. The loosely coupled multiprocessor system according to claim 1. 5. A connection information read command for acquiring an operating status of a connected processor in a disk array device that controls a logical disk in which redundant data is added to data divided into a plurality of physical disks and recorded. Connection status notification means that obtains the operating status of a plurality of processors and notifies the requesting processor, and message interrupts to processors other than the requesting processor in response to a message communication instruction for message communication between processors And a message communication means for performing the following. 6. The message communication means, when receiving a message communication instruction and a message from a processor, acquires the operating status of the plurality of processors from the connection status notifying means, and performs a message interrupt to the active processor. The disk array device according to claim 5.