JPH0581090A - File recall control system - Google Patents

Abstract

PURPOSE:To control the performance of recalling at the time of the high load of the system and to control the recalling of file not to cause the deterioration of performance for other jobs when performing recalling by performing the recall when the load is judged to be low while monitoring a load state of the system in a system to be recalled automatically when a fill not used within a prescribed period is used by migration. CONSTITUTION:In the case of the migration of the file to be used by a job for the system, the recall request is registered to a recall queue matrix control means 5. A system load check means 6 checks the using state of the system resource such as a CPU and an I/O channel on demand, and starts a recall execution means 7 when the load of the system is judged to be low, executing the recall registered in the queue.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file recall control system for a computer system, and more particularly to a file recall control system automatically recalled when a migrated file is used.

[0002]

2. Description of the Related Art A system in which a file on a high speed auxiliary storage medium that has not been used for a certain period of time is automatically migrated to the low speed auxiliary storage medium and is automatically recalled on the high speed auxiliary storage medium when used. In the conventional file recall control method, when a file used in a job has been migrated, the file recall is executed when the file is needed regardless of the load state of the system.

[0003]

In the conventional file recall control method described above, since the recall of the file is performed regardless of the load state of the system, the recall is executed even in the high load state of the system. It has the drawback of placing additional load on the system, which may result in performance degradation of online and other important jobs running concurrently.

An object of the present invention is to provide a file recall control system that controls the execution of a recall according to the load state of the system and does not cause a high load state of the system due to the execution of the recall.

[0005]

According to the file recall control method of the present invention, a file on an auxiliary storage medium with high access speed that has not been used for a certain period of time is automatically migrated to an auxiliary storage medium with low access speed. Has been
In the file recall control method of the system that is automatically recalled to the high-speed auxiliary storage medium when used, the transfer result recording file that records information such as the migrated file name and file capacity, and the file are used A job submitting means for submitting a job, a JCL analyzing means for analyzing the JCL of the submitted job, and whether the file used by the submitted job is migrated is confirmed by referring to the transfer result recording file. And a recall advance request means for making a recall request when being migrated,
The load status of the system is checked by checking the recall queue control means for registering the requested recall in the recall execution queue and controlling the sequential execution, and the usage status of system resources such as CPU and I / O channels. A system load check means for determining whether the system load is low, a recall execution means for performing a recall registered in the recall queue when the system load check means determines that the system load is low, and a submitted job Job execution queue control means for registering in the execution queue and controlling to execute sequentially, and waiting for recall completion by waiting for job execution until the recall of the requested file is completed by the recall advance request means Means and a job execution means for executing a job that can be executed. It is configured Te.

[0006]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a file recall control system of the present invention. Referring to FIG. 1, in this embodiment, a transfer result recording file 1, a job inputting means 2, a JCL analyzing means 3, a recall advance requesting means 4,
It is composed of a recall queue control means 5, a system load check means 6, a recall execution means 7, a job execution queue control means 8, a recall end wait means 9, and a job execution means 10.

In the transfer result recording file 1, information is recorded which files have been migrated, that is, which files need to be recalled when used.

The job submitting means 2 submits a job using a file to the computer system. Then, the JCL analysis means 3 analyzes the JCL of the submitted job.

On the other hand, the recall advance requesting means 4 uses the JCL
Whether or not the file used by the submitted job is migrated by the JCL analyzed by the analysis unit 3 is checked by referring to the transfer result recording file 1, and when the file is migrated,
Make a recall request.

Then, the recall queue control means 5 is
The recall of the file requested by the recall advance request means 4 is registered in the recall queue, and control is performed so that the recall is executed sequentially.

On the other hand, the system load check means 6 is C
The usage of system resources such as PUs and I / O channels is checked at any time to determine whether the system load is high.

Then, the recall execution means 7 executes the recall of the file registered in the recall queue control means 5 when the system load check means 6 determines that the system load is low.

On the other hand, the job execution queue control means 8 is
The submitted jobs are registered in the job execution queue, and control is performed so that they are sequentially executed.

Further, the recall end waiting means 9 waits for the execution of the job until the recall of all the files for which the recall request is made by the recall advance request means 4 among the files used by the job is completed.

Then, the job executing means 10 executes the job which has become executable.

Next, the operation of this embodiment will be described with reference to the drawings.

FIG. 2 is a flow chart showing an example of processing of the file recall control system of this embodiment. As shown in FIG. 2, first, the user submits a job using a file to the system by the job submitting means 2 (step 2).
1). The JCL analysis means 3 performs JCL syntax analysis on the submitted job (step 22).

Then, the recall advance request means 4 uses the JC.
Based on the result analyzed by the L analysis means 3, it is confirmed whether or not the file used by the submitted job is migrated, by referring to the transfer result recording file 1, and when it is migrated, the recall is performed. The request is registered in the recall queue control means 5 (step 23).

Further, the recall queue control means 5 controls the recall advance request means 4 to register the recall of the requested file in the recall queue and execute them sequentially (step 24).

On the other hand, the system load check means 6 is C
The use status of system resources such as PU and I / O channels is checked at any time, and if it is determined that the system load is low, the recall execution means 7 is activated (step 2).
5). Then, the recall executing means 7 is activated by the system load checking means 6 when the system load is low, and executes the recall registered in the recall queue control means 5 (step 26).

On the other hand, the job execution queue control means 8
The submitted jobs are registered in the job execution queue, controlled to be sequentially executed, and the recall end waiting means 9 is activated when the execution order is rotated (step 2).
7).

The recall end waiting means 9 recalls all the files used by the job whose execution sequence has been changed by the job execution queue control means 8 for which a recall request has been issued by the recall advance request means 4. The execution of the job is waited until the completion of the job, and the job execution means 10 is started when the recall is completed. If the recall is completed while the job execution queue control means 8 is waiting for job execution, or if the job does not need to be recalled, the job execution means 10 is immediately activated (step 28). ).

Then, the job executing means 10 executes the executable job (step 29).

[0025]

As described above, according to the file recall control method of the present invention, a file on the auxiliary storage medium which is not accessed for a certain period of time and has high access speed is automatically transferred to the auxiliary storage medium of which access speed is low. In a system that is migrated to and automatically recalled to a fast auxiliary storage medium when used, it checks the system load state when recalling files and recalls when the system load is low In order to do so, the system load will not be increased by performing a recall when the system is under heavy load, and as a result, the system will not be overloaded, resulting in online or other important This has the effect of not causing performance degradation of various jobs.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a file recall control system of the present invention.

FIG. 2 is a flow chart showing an example of processing of a file recall control system of the present embodiment.

[Explanation of symbols]

 1 Move Result Recording File 2 Job Submitting Means 3 JCL Analyzing Means 4 Recall Advance Request Means 5 Recall Queue Control Means 6 System Load Checking Means 7 Recall Execution Means 8 Job Execution Queue Control Means 9 Recall End Wait Means 10 Job Execution Means

Claims (1)

[Claims] 1. A file on an auxiliary storage medium with high access speed that has not been used for a certain period of time is automatically migrated to an auxiliary storage medium with low access speed,
In the file recall control method of the system that is automatically recalled to the high-speed auxiliary storage medium when used, the transfer result recording file that records information such as the migrated file name and file size, and the file are used A job submitting means for submitting a job, a JCL analyzing means for analyzing the JCL of the submitted job, and whether the file used by the submitted job is migrated is confirmed by referring to the transfer result recording file. When migration is performed, a recall advance request means for making a recall request, a recall queue control means for registering the requested recall in the recall execution queue, and controlling the sequential execution, a CPU, Check the usage status of system resources such as I / O channels. System load check means for determining the load status of the system, and a recall execution means for performing a recall registered in the recall queue when the system load check means determines that the system load is low. The job execution queue control means for registering the submitted jobs in the job execution queue and controlling the jobs to be executed sequentially, and the recall advance request means until the recall of the recall requested file is completed. A file recall control method comprising: a recall end waiting means for waiting for the execution of a job, and a job execution means for executing an executable job.