JPS63201826A - Processing system for preventing abnormal termination of job - Google Patents

Abstract

PURPOSE:To reduce the abnormal termination due to the lack of space by setting a job requesting a space larger than the idle space of a DASD (direct access storage device), to a waiting state. CONSTITUTION:A space managing function 2 manages a bit of space managing information of a volume table of contents (VTOC) 4 to allocate a data storage area 6 with respect to the space acquisition request of a DASD volume 3 from plural jobs 1A and 1B. When the capacity of the space whose acquisition is requested from the job is smaller than an idle space capacity 10, the function 2 segment a required capacity from an idle space 7 and gives it to the job. When the capacity of the space whose acquisition is requested from the job is larger than the idle space capacity 100 and is smaller than the capacity resulting from the addition of the idle space capacity 10 and a space capacity 11 used as a temporary file, this job is set to the waiting state, and the requested space capacity is given to the job when the idle space can be acquired. Thus, the frequency of job abnormal termination due to the lack of space is sufficiently reduced.

Description

[Detailed Description of the Invention] [Summary] When making a space acquisition request for a DASD volume, as long as the request exceeds the size of the current free space and does not exceed the sum of the free space and the space used by temporary files. It has been disclosed that in some cases, the request is placed in a waiting state without causing the job to terminate abnormally, thereby reducing the occurrence of abnormal termination due to lack of space, for example, during unmanned operation at night.

(Industrial Application Field) The present invention relates to a job abnormal termination prevention processing method that prevents job abnormal termination that occurs in connection with DASD volume space management in a data processing device.In DASD space management, system throughput is maximized. The method for allocating space to jobs has been improved.

During operation, there are many cases where jobs end abnormally due to lack of space.

[Conventional technology]

Conventionally, space is allocated to jobs in a way that maximizes system throughput, but if there is insufficient space to respond to requests to acquire space during operation, the job is likely to be terminated abnormally. It had become.

[Problem that the invention seeks to solve]

The area used as a temporary file will be released when the job using the area is finished, so it may take a while (if you wait, the area used as a temporary file will be released and the requested amount will be satisfied). However, in the conventional case, the system ends abnormally.This has led to the abnormal end of the work, such as during unmanned operation at night.

[Means for solving problems]

The present invention solves the above problems and takes into consideration the area used for temporary files to reduce cases of abnormal termination.

FIG. 1 shows a basic configuration diagram of the present invention. Symbol IA in the figure,
IB is a job, 2 is a space management function, and 3 is a direct access storage device (DASD).

4 is Volume Table of Contents (VTO)
C), 5 is space management information, 6 is data storage area, 7
is free space, 8 is space used for temporary files, and 9 is space used for saved files.

10 is free space amount information in the space management information.

Reference numeral 11 also represents temporary file usage space amount information in the space management information.

The data storage area 6 includes an empty space 7, a temporary file usage space 8 where the area is temporarily used,
The area is divided into storage file usage space 9 which is used for a long period of time and managed. And vToc4
In the space management information 5, free space amount information 10 is managed as before, and temporary file usage space amount information 11 is managed in a new manner.

[Effect]

When a request is made to acquire space from a job.

The space management function 2 reads the space management information 5.

(i>If the amount of requested acquisition is less than the amount of free space, the required amount is cut out from the free space 7 and acquired.

(ii) If the amount of acquisition requests is larger than the amount of free space, and if it is smaller than the total value of the amount of free space and the amount of space used for temporary files, it is placed in a waiting state. Then, when the free space becomes available for acquisition, it is acquired.

(iii) If it is greater than the above total value, the job ends abnormally, as in the conventional case.

For this reason, the frequency of abnormal termination of jobs due to lack of space is sufficiently reduced.

〔Example〕

FIG. 2 is an example of the process of the caller in the space management function of the present invention, FIG. 3 is an example of the space management information of the present invention, FIG. 4 is the file deletion process of the present invention, and FIG. It shows file allocation processing in the invention.

As shown in FIG. 2, when the caller runs out of space, it waits for space to become available.

Then, when the space reservation is notified, the process returns to the call.

The space management information is as shown in FIG.

There is a free space amount (FS) 10 and a temporary file used space amount (TUS) 11 in the VTOC 4, and the caller in the space management function 2 is notified of "the amount of space requested by the caller to secure" (R3), [The amount of space J (DS) that was requested to be deleted by the caller exists.

Regarding the file deletion process, as shown in Figure 4,
(i) When there is a saved file (DS) that can be included in the free space, the amount of free space (DS)
(ii) When a temporary file that can be incorporated into the free space (DS) occurs, the free space amount (FS) is increased by that amount, and the temporary file used space amount (TUS) is decreased. And if there is a request to use the free space.

The notification shown in Figure 2 (■) is made.

The file allocation process is performed as shown in FIG. In other words, R1-(al is the amount of free space (F S
) is large. In addition, route (b) indicates that the amount of space for which a space acquisition request was requested (R8) is larger than the amount of free space (FS) at that time, and the amount of free space (FS) and the amount of space used for temporary files (TUS) are different. If the sum is less than the sum, the request is connected to the waiting queue. Route (C) is a case where the job ends abnormally.

〔Effect of the invention〕

According to the present invention, space management is performed taking into consideration the amount of space used by temporary files, and the abnormal termination of jobs due to insufficient space is greatly reduced. It should be noted that it is possible to arbitrarily make a selection such that the waiting state as referred to in the present invention occurs only during night driving, for example.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the principle configuration of the present invention, Fig. 2 is an example of processing of a calling source in the space management function of the invention, Fig. 3 is an example of space management information in the invention, and Fig. 4 is a diagram of the main function of the present invention. File deletion processing according to the invention. FIG. 5 shows file allocation processing according to the invention. In the diagram, 1 is a job, 2 is a space management function, and 3 is a DAS
D, 4 represents VTOC, and 5 represents space management information.

Claims (1)

[Claims] A configuration that manages an area allocated on a DASD volume by dividing it into free space, a temporary file area that is used temporarily, and a storage file that is used for a long time. In response to a space acquisition request, in response to a space acquisition request, in a data processing device with A processing method for preventing abnormal job termination, characterized in that the request is configured to be placed in a waiting state, the request is configured not to end in abnormal termination of the job, and processing is performed when space is released.