JPS6361693B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a job control system in a computer that enables job re-execution quickly and correctly by restarting the system quickly and guaranteeing the state before the interruption when the system is interrupted. It is related to the method.

Conventional methods for re-running a job processing program due to system interruption include the journal method (a method in which only changes in the job information are extracted as a separate file) and the checkpoint file method (a method in which only changes in the job information are extracted as a separate file) and a checkpoint file method (a method in which only changes in job information are extracted as a separate file) A known method is to dump all job information into a user file. In these conventional methods, when re-executing a job processing program, it is necessary to merge information from before the system was interrupted (such as job control statements regarding a group of computer data specified by the user) with journal information and check point information. This is causing a significant delay in restarting the system. Furthermore, if journal information or check point information does not exist, there is a high possibility that problems will occur, such as making it impossible to re-execute the job or leaving job garbage behind.

The present invention is based on the above considerations, and includes:
The purpose of the present invention is to provide a job control method that has the characteristics of being able to quickly recover and start up the system in the event of a system interruption, smoothly re-executing the job processing program, and not leaving any garbage in the system. . Therefore, the job control method of the present invention includes a job input control section, a job execution processing section, a job execution control section, a job post-execution processing section, a job output control section, a queue management section, and a job information management section. a queue buffer managed by the queue management unit, a duplicate file for queue information managed by the queue management unit, and a job information buffer managed by the job information management unit. , and a duplex file for job information managed by the job information management section, and the job input control section secures a queue element in the queue buffer for the input job and the job information management section. Requests the queue management section to set the status of the element to inputting, sets job information based on the input job control statement, and requests that the set job information be stored in the job information buffer. The queue management unit is configured to request the information management unit, and then request the queue management unit to change the status of the queue element for the job to execution waiting, and select one job from among the jobs waiting for the waiting status. The job schedule control unit, which controls the command to the next processing unit for the selected job, selects one job from among the jobs waiting to be executed, and instructs that pre-execution processing should be performed on the selected job. When the pre-execution processing unit is instructed to perform pre-execution processing of a job, the pre-execution processing unit instructs the queue element status for the job to be performed during pre-execution processing. A request is made to the job information management section to allocate computer resources necessary for job execution to the job, and to store the allocated computer resources in the job information buffer in order to store them as job information. The queue management unit is configured to request the queue management unit to change the status of the queue element of the job during execution of the processing program, and the queue management unit receives a request to update the contents of the queue element. The job information management unit is configured to update the contents of the queue element for the specified job on the queue buffer and copy the updated contents of the queue buffer to the duplex file for queue information. , when a job information update request is received, the contents of the corresponding job information buffer are updated, and the contents of the job information buffer are copied to the duplex file for job information at a predetermined timing. This is a characteristic feature. Hereinafter, the present invention will be explained with reference to the drawings.

The figure shows one embodiment of the present invention, 1
is an input control section, 2 is a pre-execution processing section, 3 is a job execution control section, 4 is a post-execution processing section, 5 is an output control section,
6 is Kyu Management Department, 7 is Kyu Batshua, 7'
are queue elements, 8-1 and 8-2 are files, 9 is a job information management unit, 10 is a job information buffer, 11-1 and 11-2 are also files, 12 and 13 are schedulers, 14 is a computer resource group, 1
4' and 14'' are sub computer resource groups, 14'-2 and 1
4'-n, 14''-1, 14''-2 and 14''-n indicate computer resources, respectively. Also,...
identifies a processing step. It should be noted that the end of the arrow may be considered to be connected to the end of the arrow, and the end of the arrow may be considered to be connected to the end of the arrow.

The input control unit 1 performs the following processing.

Securing queue elements and
The queue management section 6 is requested to write the status to the element. The status at this time is inputting. The size of one queue element 7' is 32 bytes, and the size of one queue element 7' is 32 bytes.
Element 7' contains one job information buffer 1.
There is a one-to-one correspondence with 0. The size of one job information buffer is 4096 bytes.

Converts the input job control statement into job information in a format readable by the control program (for example, the computer sub-resource group 14' or 14'' of the computer resource group 14), and stores this job information in the job information buffer 10. The job information management section 9 is requested to do what should be done.One job can have a plurality of job information buffers 10.

The queue management unit 6 is requested to change the status of the queue element for the job to "waiting for execution". The scheduler 12 selects one job from among the jobs waiting to be executed,
It instructs the job pre-execution processing section 2 to perform pre-execution processing on the selected job. When the pre-execution processing of a job is instructed, the pre-execution processing unit 2 performs the following processing.

A request is made to the queue management unit 6 to change the status of the queue:element to "pre-execution processing" for the job.

In order to allocate a specific computer resource 14'-n or 14''-n to the computer sub-resource group 14' or 14'' specified by the user, the job management computer sub-resource group 14' or 14'' is assigned as a specific computer resource. Update to 14'-n or 14''-n. Then, the job information management unit 9 is requested to store the updated job information in the assigned computer resource 14'-n or 4''-n in the job information buffer 10. The job information management unit 9 is also requested to store this information in the job information buffer 10. This prepares for restarting the system due to system interruption and prepares for re-execution of the job processing program.

Once the preprocessing such as allocating resources necessary for running the job processing program is completed,
The queue management unit 6 is requested to change the status of the queue element to "processing program in progress." With the above steps, preparations are made for unexpected execution of the job processing program due to system interruption.
At the time of re-execution, the effect of directly updating the job information eliminates the need for special processing for re-execution, allowing control to be passed to the processing program simply by running the normal route (pre-execution processing section 2) again. It becomes possible. In addition, since the user-designated resources are used as specific resources, the state before system interruption can be completely restored.

When the job execution pre-processing is completed, the job execution control section 3 is activated. Job execution control unit 3
transfers control to the processing program specified in the job control statement and starts this processing program. When the processing program finishes running, control is passed to the post-execution processing section 4. The post-execution processing unit 4 performs the following processing.

A request is made to the queue management unit 6 to change the status of the queue element for the job to "post-execution processing".

The job information management unit 9 is requested to perform resource release processing and reflect the resource release in job information.

The queue management unit 6 is requested to change the status of the queue element for the job to "wait for output".

The scheduler 13 selects one job from among the jobs waiting for output, and requests the output control unit 5 to perform output processing on the selected job. The output control unit 5 performs the following processing.

A request is made to the queue management 6 to change the status of the queue element for the job to "outputting".

In order to output the job information, the output control section requests the job information management section 9 to read out the job information, and outputs the job information.

The queue management unit 6 is requested to return the queue element for the job. QU management department 6
performs the following processing.

In response to the user's queue update request, the corresponding queue
Update elements.

The contents of the queue buffer are sent to files 8-1 and 8-2 in synchronization with the queue update request from the user.
Copy to.

The job information management section 9 performs the following processing.

In accordance with a job information update request from a user, the contents of the corresponding job information buffer 10 are updated.

Save the contents of job information buffer 10 to file 1
Copy to 1-1 and 11-2. File 11
Job information updates in -1 and 11-2 are not synchronized with user update requests. There are so many opportunities to update job information that the input/output operations each time become overloaded. Increase head. Then,
Wait for a set number of battles for each job,
The LRU algorithm is used to speed up processing by reducing the number of I times. Since input/output operations are performed asynchronously, files 11-1,
The information guarantee in 11-2 is such that when the status of a queue element is updated, the contents of the related job information buffer are transferred to the file 11-1,
This is done by exhaling in 11-2.

As is clear from the above description, according to the present invention, when the system is interrupted, the system can be quickly restored to the state immediately before the interruption and restarted, the job processing program can be re-executed quickly and correctly, and It is possible to achieve remarkable effects such as not leaving garpages caused by jobs in the system. Note that the input control unit 1, the execution preprocessing unit 2
Job execution control section 3, post-execution processing section 4, output control section 5, queue management section 6, and job information management section 9
is realized by a program.

[Brief explanation of drawings]

The figure shows one embodiment of the invention. 1...Input control unit, 2...Execution preprocessing unit, 3...
...Job execution control unit, 4...Post-execution processing unit, 5...
...output control unit, 6...queue management section, 7...queue buffer, 7'...queue element, 8
-1 and 8-2... file, 9... job information management department, 10... job information buffer, 11-1 and 11-2... file, 12 and 13... scheduler, 14... computer resource group, 14' and 14''...
Sub computer resource group, 14'-1, 14'-2 and 1
4'-n, 14''-1, 14''-2 and 14''-n...
Computer resources.

Claims (1)

[Scope of Claims] 1. Job input control section, job execution pre-processing section, job execution control section, job execution post-processing section, job output control section, queue management section, job information management section, A job schedule control section, a queue buffer managed by the queue management section, a duplicate queue information file managed by the queue management section, and a queue information management section managed by the job information management section. It comprises a job information buffer and a duplex file for job information managed by the job information management section, and the job input control section secures a queue element in the queue buffer for the submitted job. and request the queue management section to set the status of the queue element to inputting, set job information based on the input job control statement, and store the set job information in the job information buffer. The job information management unit is configured to request the job information management unit to change the status of the queue element for the job, and then request the queue management unit to change the status of the queue element for the job to the waiting status, and from among the jobs waiting for the waiting status, 1
The job schedule control unit selects one job from among the jobs waiting to be executed and performs pre-execution processing on the selected job. When the pre-processing unit is instructed to perform pre-processing of a job, the pre-processing unit changes the status of the queue element for the job under pre-processing. The queue manager is requested to allocate computer resources necessary for job execution to the job, and to store the allocated computer resources in the job information buffer in order to store them as job information. The queue management unit is configured to request the information management unit to check the status of the queue element of the job, and then request the queue management unit to check the status of the queue element of the job during execution of the processing program; When an update request is received, the contents of the queue element for the specified job are updated on the queue buffer, and the updated contents of the queue buffer are copied to the duplex file for queue information. The job information management unit is configured to update the contents of the corresponding job information buffer when a job information update request is received, and to copy the contents of the job information buffer to the job information duplex file at a predetermined timing. The job control method is characterized by: