JPH0797342B2 - How to start a computer job - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a job activation method for a computer, and in particular, when an allocation target file specified in a job description is a migrated file, it is recalled. The present invention relates to a method for starting a job of a computer that is assigned to a job and starts the job.

[Prior art] In the file system of a computer, file migration (file migration Transfers and recalls are being carried out. That is, the file created in the external storage device,
When access to the file is completed, the access speed becomes slow and the file is migrated to another external storage device with a large capacity, and when the request to start access to the file is requested again, the access speed becomes fast and the input / output load balance I'm trying to recall to the optimal external storage device.

[Problems to be Solved by the Invention]

By the way, in a computer system that employs the file system as described above, when performing a job startup process, generally, a file that has been migrated is recalled prior to allocating a file (file resource) to the job, but If there are many files, the recall processing time cannot be ignored and the job start processing cannot be performed in a short time. In other words, when executing a batch job, for example, the allocation of the file used by the job is instructed by the job control language, etc., and if the operating system knows that the file to be allocated is migrated, it executes the resource allocation process. To call the recall process, and when the recall process is completed, allocate the file to the job to be started for the first time (as a system that employs such a recall method, FACOM OS IV / F
4 There is an ADF system in MSP. References; FACOM OS
IV / F4 MSP ADF Operator's Guide) Therefore, if some of the files to be allocated in the job are migrated, the recall process of those files is executed only sequentially, so it takes a long time to allocate the resources.

Since the recall process is executed exclusively for the task in which the resource allocation process is executed, there is a possibility that the resource allocation process of another subsequent job may be kept waiting for a long time.

There were drawbacks such as.

The present invention has been proposed in view of the above points, and it is an object of the present invention to provide a job for a computer that can reduce the overall processing time of job startup processing that involves recall processing of migrated files. It is to provide a starting method.

[Means for Solving the Problems]

In order to achieve the above object, the present invention assigns a file to a job when the file to be assigned specified in the job description is a recalled file, and recalls it when it is a migrated file. In the job start method of the computer that is assigned to the job and starts the job, when the file to be assigned is the migrated file in the job start processing in the job start processing task based on one job description, When a recall request is issued to another task, that is, a recall processing task, the job start processing based on the job description is continued without waiting for the completion of the recall processing, and when the processing up to the last step of the job description is completed, Any file specified in the job description If it is still migrating, if there is a file assigned to the job, release the file and suspend the job activation process based on the job description until the recall process task notifies the completion of the recall process. Then, other unprocessed job descriptions are processed by the job activation processing task.

〔Example〕

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

FIG. 1 is a diagram showing an embodiment of a computer job starting method according to the present invention. In FIG. 1, 11 is a pre-job start processing step for creating a control structure and the like necessary for executing a job prior to starting the job, and 12 is whether a file (file resource) to be allocated to the job has been migrated. File management File search step to judge by checking the file, 13 is a resource allocation step that allocates unmigrated files (including files recalled by the recall request step 14 described later) to the job, and 14 is migrated Recall process that consists of another task for a file that has a specified task Recall request step that requests the recall of the file by activating the recall process of the task, 15 starts the job after all the files to be used in the job are allocated Job start step, 16 for job start Therefore, if at least one of the files used in the job has been migrated, all the files that have been allocated resources are released, and the recall processing for all the requested files is completed. This is a job activation suspending step for waiting for execution.

FIG. 2 is a diagram showing an embodiment in which FIG. 1 is made more concrete, and the operation will be described below with reference to FIG. In the job description 10 described in the job control language, the migrated file A (migration volume, which is a large-capacity external storage device with a slow access speed, is used).
File stored in 32) and file B not migrated (file stored in access volume 31 which is an external storage device having a high access speed and optimal load balance of I / O). To do.

Then, in the job activation process 100, first, the job description 1
Read the first $ JOB statement of 0 and start job preprocessing Step 11
Create a control structure etc. to start the job by
Perform preparatory work. Then, the $ ASSIGN statement in which the files used in the job in the job description 10 are designated is read one by one, and the file management file search step 12 is executed. In this file management file search step 12,
The file management file 33 that manages the location of the file is read, and if the file to be allocated is migrated to the migration volume 32 like the file A, the recall request step 14 is executed. Here, in the recall request step 14, the recall process task 2 including a task different from the job activation process 100
It only requests the recall process to 00, and does not wait for the completion of the recall process. After making the request, the process returns to the file management file search step 12 to process the next $ ASSIGN statement.

In the file management file search step 12,
If the file to be allocated exists in the access volume 31 that can be accessed immediately like the file B, the resource allocation step 13 is executed, and the external storage device in which the file provided by the file management file 33 is stored. The file is assigned to the job based on the information.

When the processing of the $ ASSIGN statement for all files is completed, the job start processing 100 reads the final $ ENDJOB statement of the job description 10.

At this stage, if all the files can be assigned to the job by the processing of the previous $ ASSIGN statement, the job starting step 15 is executed and the execution of the job is started. However, if there is at least one file that has been migrated at this stage, the job activation suspension step 16 is executed, and in this job activation suspension step 16,
The file already allocated to the job is released in the resource allocation step 13, the job starting process is temporarily suspended, and the recall process task 200 waits for the completion of the recall process. Note that the job activation process 100 continues the activation process for another job during this period, and executes the series of steps starting from the job activation preprocessing step 11 described above.

On the other hand, the recall processing task 200 simultaneously executes the recall processing of all the files requested to be recalled, and notifies the job activation processing 100 of the completion of the recall processing when all the recall processings are completed. Then, the job activation process 100 notified of the completion restarts the job activation process for the job while considering the relationship with the process being executed at that time, and executes the series of steps following the job activation preprocessing step 11. , Lead to launch the job.

〔The invention's effect〕

As described above, according to the computer job activation method of the present invention, in the job activation process in the job activation process based on one job description, when the allocation target file is a migrated file, another Recall process, which is a task Since the job start process based on the job description is continued without issuing a recall request to the task and waiting for the completion of the recall process, the job start process and the recall process based on the job description are executed in parallel. The efficiency of job activation processing based on individual job descriptions is improved.

In addition, if any of the files specified in the job description is still being migrated when the processing up to the final step of the job description is complete, and if the file assigned to the job exists, the Until the recall processing task notifies the completion of the recall processing by releasing the file, the job activation processing based on the job description is put on hold, and another unprocessed job description is processed by the job activation processing task. Therefore, the unnecessary waiting time is eliminated, and the starting process of the subsequent job can be started promptly.

As a result, it is possible to improve the overall efficiency of the job activation process.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a computer job starting method of the present invention, and FIG. 2 is a diagram showing an embodiment in which FIG. 1 is more concrete. In the figure, 100 ... Job start processing, 11 ... Job start preprocessing step, 12 ... File management file search step, 13 ... Resource allocation step, 14 ... Recall request step, 15 ... Job start step, 16 …… Job activation hold step, 200 …… Recall processing task, 31
...... Access volume, 32 …… Migration volume, 33 …… File management file.

Claims (1)

[Claims] 1. When the allocation target file specified in the job description is a recalled file, the file is assigned to the job, and when the file is migrated, it is recalled and then assigned to the job. In the job activation method of the computer that activates the job, in the job activation process in the task for the job activation process based on one job description, if the allocation target file is a migrated file, another task recall Specified in the job description when the recall request is issued to the processing task and the job activation process based on the job description continues without waiting for the completion of the recall process, and when the last step of the job description has been processed One of the files created is still migrating If there is a file assigned to the job, the file is released and the job activation process based on the job description is suspended until the recall process task notifies the completion of the recall process. A method for starting a job on a computer, wherein an unprocessed job description is processed by a job start processing task.