JPH11242623A - File exclusive control processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the loss of fault analysis information to ensure restoration from a fault by performing a health check between two processing systems, which exclusively control a shared file, to confirm the operation state of each other. SOLUTION: A file exclusive control processor 10 is provided with two file exclusive control processing systems 10A and 10B, and two processing systems perform health checks of each other in the normal operation state. That is, two processing systems 10A and 10B make inquiries to confirm the operation state of each other; and if one processing system falls into the inoperable state because of the occurrence of a fault in this processing system, the other processing system executes the processing of the one processing system and collects data processed in one processing system till then to pick up fault analysis information. Thus, fault analysis information is not lost even if the processing system falls into the inoperable state because of the occurrence of a fault, and restoration from the fault is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file exclusion control processing apparatus for performing exclusion control of a shared file, and more particularly to a failure recovery system.

[0002]

2. Description of the Related Art Conventionally, in a computer system provided with a plurality of host computers and a shared file, the right of use of the shared file is controlled by a request from each host computer using a file exclusion control processing device. That is, when a certain host computer accesses a shared file, the exclusive control processing device requests the right to use the shared file, and the exclusive control processing device checks the requested use right of the file and sends it to another host. If not, the requesting host has been given the right to access the file. Further, a method of duplicating the processing device as a measure against the failure of the file exclusion control processing device is also known.

[0003]

In the prior art, when the file exclusion control processing device becomes inoperable due to a hardware failure, a method for recovering the failure is usually adopted by turning on the power again. Have been. However, in the method using the power supply again, the fault information is lost due to the power cutoff. Even if the processing apparatus is duplexed, the fault information is lost due to the power cutoff. It was difficult, especially in the case of intermittent failure, and it was difficult to analyze the cause of the failure.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a file exclusion control processing device capable of preventing loss of failure analysis information and reliably recovering from a failure. I do.

[0005]

According to the present invention, there are provided two processing systems for exclusive control of a shared file,
Means for performing a health check between one processing system and another for confirming the operating state of the other processing system. Then, when a failure occurs in another processing system based on the result of the health check, the failure analysis information of the processing systems in which the failure has occurred is collected from each other, so that the failure can be easily recovered.

[0006]

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a loosely coupled computer system using a file exclusion control processing device according to the present invention. Normally, the file exclusion control processing device 10 is connected to a plurality of host computers 11 to 14 through dedicated interfaces. Also, each of the host computers 11 to 14
Are connected to a storage device 15 having a shared file.

FIG. 2 is a block diagram showing the configuration of an embodiment of the file exclusion control processing device of the present invention. In FIG. 2, first, the file exclusion control processing device 10 has a duplex structure, and has two file exclusion control processing systems 10.
A, 10B. The two exclusive control processing systems 10A and 10B share exclusive control of a shared file of a plurality of host computers, and perform exclusive control of a host computer in charge of each of the plurality of host computers. However, the two file exclusive control processing systems 10
A and 10B are connected by an inter-system interface 8 and mutually perform exclusive control of a shared file for all host computers by exchanging information regarding exclusive control between the systems.

The exclusive control processing systems 10A, 10B
Are an upper interface adapter 2 for connecting to a host computer, an exclusive control processing unit 5 for performing exclusive control using an exclusive control table developed on a memory 6 based on an instruction from the host computer, and an exclusive control processing system. Interface adapter 7 for controlling communication between systems
It has. The configuration and operation of the intersystem interface adapter 7 will be described later in detail. In addition, 3 in FIG.
Is an upper interface for connecting to a host computer, and 4 is an internal bus for connecting each block in each of the exclusive control processing systems 10A and 10B.

FIG. 3 is a block diagram showing the configuration of the inter-system interface adapter 7. As shown in FIG. In FIG. 3, first, the processor 23 has FW (firmware),
It controls each block in the intersystem interface adapter 7. The inter-system interface control unit 22 controls an interface with another processing system, and the bus control unit 24 is connected to the internal bus 4 and controls data transfer with the memory 6 and the exclusive control processing unit 5. The control memory 21 is a memory used by the processor 23, and is used as a control table and a data input / output buffer.

Next, the operation of this embodiment will be described. First, in the loosely coupled computer system of FIG. 1, the file exclusion control processing device 10 is connected to the plurality of host computers 11 to 14 and performs exclusive control of a shared file among the host computers as described above. That is, each of the host computers 11 to 14
In the case of referring to / updating the shared file in the file 5, the target exclusive file is instructed to be locked to the file exclusive control processing device 10, and when the use permission is given by the file exclusive control processing device 10, the target shared file is Perform access. In this case, 2 in the file exclusion control processor 10
One of the exclusive control processing systems 10A and 10B performs exclusive control of a shared file of all host computers, and when one of the processing systems becomes inoperable, the other processing system takes over the exclusive control of the inoperable processing system. It is configured.

Next, in the present embodiment, the file exclusion control processing device 10 has two file exclusion control processing systems 10A and 10B. Checking. In other words, when the two processing systems 10A and 10B make an inquiry for confirming the operation state of the other processing system, and when a failure occurs in the other processing system and the operation becomes inoperable, the other processing system becomes inoperable. In addition to taking over the processing, it collects data of the processing system in which the failure has occurred up to that point and collects failure analysis information.

The health check is performed between the interfaces 8
Alternatively, the exclusive control processing unit 5 of each of the processing systems 10A and 10B transfers a data collection instruction to the inter-system interface adapter 7 when there is no response or some error in the health check. The inter-system interface adapter 7 transfers a memory data collection instruction to the other inter-system interface adapter 7 via the inter-system interface 8.

FIG. 4 is a flowchart showing the processing of the system interface adapter 7 between the own system and the other system when receiving the data collection instruction. For example, the file exclusion control processing system 10A will be described as its own system, and the file exclusion control processing system 10B will be described as another system. In FIG. 4, first,
It is assumed that the exclusive control processing system 10B of the other system becomes inoperable due to no response or some error in the health check of the file exclusive control processing system 10A of the own system. At this time, as described above, the exclusive control processing unit 5 of the own system issues a data collection instruction to the inter-system interface adapter 7, and the inter-system interface adapter 7 determines whether the received data is a data collection instruction (step 40).
1).

As a result of this determination, if the received data is a data collection instruction, the inter-system interface adapter 7 collects information from the memory 6 with respect to the inter-system interface adapter 7 of the file exclusion control processing system 10B of the other system. The instruction is transferred (Step 402). Since the memory 6 stores data that has been processed until immediately before the failure of the processing system 10B, the failure is analyzed by collecting the data, and the failure is recovered based on the result. It is possible to do. Step 401
If the received data is not a data collection instruction in step, a normal transfer process is performed (step 403).

When the inter-system interface adapter 7 of the processing system 10B of the other system receives the information from the processing system 10A on the transmitting side, it determines whether or not it is an information collection instruction (step 406). 6 is read, and the data is transferred to the memory 6 on the transmission side (step 407). If it is not an information collection instruction, a normal reception process is performed (step 408). When all the data in the memory 6 has been transferred, the inter-system interface adapter 7 transfers a transfer completion instruction indicating that the data transfer has been completed to the inter-system interface adapter 7 on the processing system 10A side (step 409).

Further, the inter-system interface adapter 7 in the processing system 10A on the transmission side determines whether or not the transfer is completed (step 404). If the transfer is completed, the exclusive control processing unit 5 is interrupted. It notifies that the data collection instruction has been completed (step 405).
Thus, the process of acquiring the failure analysis information at the time of occurrence of the failure is completed. In the present embodiment, when a failure occurs, the processing system of the failure requests the data that has been processed up to that time and the failure analysis information is collected, so that the processing system becomes inoperable due to the occurrence of the failure. In this case, the failure analysis information is not lost, and the failure can be easily recovered.

[0017]

As described above, according to the present invention, 2
A health check is performed between two exclusive control processing systems, and when one of the exclusive control processing systems becomes inoperable due to a failure, failure analysis information on the failed exclusive control processing system is collected. Therefore, the failure analysis information does not disappear, and by performing the failure analysis based on the collected failure analysis information, the failure can be easily recovered even in the case of an intermittent failure.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a loosely coupled computer system using a file exclusion control processing device of the present invention.

FIG. 2 is a block diagram illustrating a configuration of an embodiment of a file exclusion control processing device of the present invention.

FIG. 3 is a block diagram illustrating a detailed configuration of an inter-system interface adapter according to the embodiment of FIG. 1;

FIG. 4 is a flowchart for explaining the operation of the embodiment of FIG. 1;

[Explanation of symbols]

 2 upper interface adapter 5 exclusive control processing unit 6 memory 7 inter-system interface adapter 8 inter-system interface 10 file exclusion control processing device 10A, 10B file exclusion control processing system 11-14 host computer 15 storage device

Claims (3)

[Claims] 1. A file exclusion control processing device that performs exclusion control of a shared file used by a plurality of host computers, and two exclusion control processing systems that perform exclusion control of the shared file, and the two exclusion control processing systems. Means for performing a health check to confirm the operation state of each other exclusive control processing system between each other, if a failure occurs in another exclusive control processing system based on the result of the health check,
A file exclusion control processing device, which collects failure analysis information of mutually exclusive exclusion control processing systems. 2. The file exclusion according to claim 1, wherein when a failure occurs in the partner processing system based on the result of the health check, exclusive control of the shared file of the failure processing system is taken over by each other. Control processing unit. 3. The file exclusion control according to claim 1, wherein the failure analysis information is data stored in a memory in a processing system of the failure occurrence and processed immediately before the failure occurrence. Processing equipment.