JPH0417057A - Job scheduling system for composite type system - Google Patents

Abstract

PURPOSE:To reduce the processing overhead of exclusive control and shared control by providing an exclusive controlling means, job selecting means, and means which stores the shared/non-shared information of a file used for a job. CONSTITUTION:Job selecting means 6-1 and 6-2 which fetch a job to be executed from spool files 2-1 and 2-2, exclusive controlling means 7-1 and 7-2 of shared/ non-shared file for securing the using right of a file used for a job, and means 8-1 and 8-2 which store the shared/non-shared information of the file used for the job are provided. When the file used for the job is not usable, a job scheduling system which returns the job to the spool files 2-1 and 2-2 is used. Accordingly, the shared file of a magnetic disk in a single system is exclusive controlled in its own system and the shared file of a magnetic disk in a composite system is exclusive controlled in the composite system. Therefore, the overall processing capacity of the composite system is improved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a job scheduling method for computer systems, and is particularly applicable to jobs that use shared resources (files, etc.) in complex systems and network systems. This invention relates to a job scheduling method suitable for this purpose.

[Conventional technology]

"Function and Structure of rMVs (Author: Masahiko Senda)" published by Kindai Kagakusha Co., Ltd. (February 10, 1986), pages 68 to 7.
As described on page 3, job scheduling in computer systems often employs a method in which a job is executed when system resources such as devices, volumes, and files necessary for job execution become available for exclusive use. There is.

When this method is applied to a complex system configuration in which multiple divider systems are connected by a channel coupling device, etc.,
If another system in the complex system is using a file with the same name but with a different volume status, the job will be executed again while waiting for the file to become available.

[Invention or problem to be solved]

Job schedules in conventional complex systems are
It is assumed that system resources such as devices, volumes, and files used in jobs are registered and managed as unique resources within the complex system. However, if a file with the same name and a different volume status is in use, the job will be executed again while waiting for the file to become available.

An object of the present invention is to provide a means for registering and managing usage classification between magnetic disk devices shared within a complex system and disk devices used only in the own system, and to manage job schedules in the complex system by (1) Files on a magnetic disk unit that are shared within a single system are under exclusive control within the own system (2) Files on a magnetic disk unit that are shared within a complex system are under exclusive control between complex systems. The objective is to improve the processing capacity of the entire complex system by reducing the number of jobs waiting for execution and suppressing the overhead of exclusive control processing between complex systems.

[Means to solve the problem]

The present invention provides job selection means for extracting a job to be executed from a spool file, exclusive control means for shared/non-shared files for securing usage rights for files used in a job, and sharing/non-shared file use for files used in a job. This is achieved by a job scheduling method that includes means for storing shared information, and returns the job to a spool file when a file used in a job is unavailable.

[Effect]

Jobs that use shared files shared between complex systems will use the same method as before building the complex system; only jobs that have secured file usage rights will be able to update and refer to shared files, and databases etc. It can be shared between complex systems.

A job that uses only files in its own system is (1
) To execute exclusive control of files within the local system even if the communication medium (shared area, channel coupling device, etc.) used as a synchronization control means to serialize file usage between complex systems becomes a failure. Job scheduling is possible (2) Since only files within the local system are used, if the file names within the local system are unique, job scheduling is possible if exclusive rights to use the files within the local system can be secured. This makes it possible to schedule jobs with the same overhead as before forming a complex system.

〔Example〕

Next, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the components of a control method showing an example of a job scheduling method in a complex system to which the present invention is applied. Reference numerals 1-1 and 1-2 in the figure are R1 computer systems that can operate independently. A spool file 2-1.2 is used as a file to store work when a job consisting of jobs 1 to 4) is submitted for execution.
-2, and a direct access device such as a magnetic disk device (hereinafter referred to as "non-shared file") that allocates files that are shared between the executing job and other jobs in the local system (hereinafter referred to as non-shared files).
A non-shared DASD (referred to as DASD)
1.3-2, a shared DASD 4 where execution jobs allocate files that are shared with other jobs between each computer system (hereinafter referred to as "between complex systems"), and files allocated within the shared DASD between complex systems (hereinafter referred to as "between complex systems"). A shared file management means 5, which is a storage device (hereinafter referred to as a shared area) corresponding to a shared memory etc. that can be referenced and updated between complex systems, is used to manage information for exclusive control of shared files (hereinafter referred to as shared files). Contains.

Each computer system 1-1.1-2 also includes job selection means 6-1.6-2 for extracting an execution job from a spool file in which a job requested for execution is registered;
Exclusive control means for shared/non-shared files that performs control to enable sequential use of shared/non-shared files used in jobs 7'', 7-
2. Files used in the job are shared or non-shared DA
Management means 8-1.8-2 for shared and non-shared volumes that manage which volumes belong to the SD, and non-shared DAS in the local system.
non-shared file management means 9-1.9-2 for managing information for exclusive control of files allocated in D; file allocation means 10-1.9-2 for making files used in jobs accessible; Contains 10-2.

Next, an overview of the operation of the job scheduling method in the complex system of the present invention will be explained using the computer system 1-1 in FIG. 1, and then details of each component will be explained in the figures from FIG. 2 onwards. Make it.

Users of the complex system input jobs using the job execution request method provided by each computer system (for example, submitting a job from the TSS environment, or inputting a job from a job input device in the case of a patch job). Then,
It is stored in the spool file 21. The job selection means 6-1 for extracting an execution job of the present invention searches a job stream for a job control statement that defines the use of files, and in order to secure usage rights for all files used in the job, is passed to the shared/non-shared file exclusive control means 7-1 of the present invention. The shared/non-shared file exclusive control means 7-1 uses the shared/non-shared volume management means 8-1 to determine whether the file used in the job or the shared D
It is determined whether the file belongs to an ASD or a non-shared DASD, and the next exclusive control operation for shared/non-shared files is executed.

<For shared files> In order to exclusively control shared files between complex systems, the shared file management means 5 for the entire complex system is used to
It is determined whether the shared file for which a use request has been made can be used, and the latest state of the shared file is stored in the shared file management means 5.

<In the case of a non-shared file> In order to exclusively control the non-shared file in the own system, the non-shared file management means 91 of the own system is used to determine whether the non-shared file for which the usage request has occurred can be used,
The latest non-shared file status is stored in the non-shared file management means 9-1.

When the shared/non-shared file exclusive control means 7-1 notifies that the usage rights for all files used in the job have been secured, control is transferred to the file allocation means 10-1 in order to make the files accessible. hand over. Once the file allocation is complete, the job will start running.

On the other hand, from the shared/non-shared file exclusive control means 71,
When it is notified that the right to use the file used by the job cannot be secured, the job is put in a state of waiting for the right to use the file to be released and returned to the spool file 2-1. When a job waiting to release the file usage rights is notified that the file usage rights have been secured from the shared/non-shared file exclusive control means 7-1 due to the end of the job that was using the file, the job is transferred to the spool file. 2-1 and restart the process from file allocation.

The above is an overview of the operation of the job scheduling method in the complex system of the present invention. Next, details of the operation will be explained using the flowcharts shown in FIG. 2 and subsequent figures and management information.

FIG. 2 is a flowchart of an example of job schedule processing by the job selection means 61 for extracting an execution job in the composite system according to the present invention. It monitors notifications of spool file registration or file usage right cancellation in its own system, and when notified of job registration or file usage rights cancellation, takes out the job (F2-1). Search for the DD statement that defines file usage in the job stream shown in Figure 3 specified in the retrieved job, and search for the file name specified by the DSN operand and the DASD to which the file indicated by the file name is allocated. From the volume serial number of the VOL=SER operand, which specifies the volume serial number for identification, and the exclusive use classification (SHR: shared use, OLD: exclusive use) specified by the DISP operand, select the file to be used in the job shown in Figure 4. An exclusive information list is created (F2-2). Exclusive control means 7- for shared/non-shared files by specifying the exclusive information list shown in FIG.
1 and request to secure file usage rights (F2
-3).

Shared/non-shared file exclusive control means 7-1 determines the secured status of the usage rights for the file used in the job, and determines whether the file is being used by other objects in the local system or other systems. If so, re-register the job in spool file 2-1 while waiting for file usage rights to be released (F2-
4, F2-5).

When the right to use the file is secured, the file allocation means 10-1 is activated to allocate the specified file in order to enable file access in the MJ computer system (F2-6). Execute the job that has completed securing file usage rights and allocating files (F2-
7). When the execution of the job is completed (F2-8), a request to release the file usage rights secured by the job is sent to the exclusive information list 1 in FIG. 4, and the shared/non-shared file exclusive control means At the same time, the file allocation means 10- is activated to release the file allocation (F2-1.0).

FIG. 5 shows exclusive control means 7-1 for shared/non-shared files.
12 is a flowchart of an example of processing for securing file usage rights. The process shown in FIG. 6 determines whether the file indicated in the exclusive information list of files used in the job shown in FIG. (F5-1).

In the example shown in FIG. 6, the volume serial number of a DASD shared between complex systems is managed as volume information of the shared DASD. Therefore, a volume that is not registered as volume information of this shared DASD will be recognized as a non-shared DASD. If the file is a shared file, shared file management that manages the status of the shared file being used in the entire complex system ■1 Secures a lock for updating the management means 5 (F5-2
, F5-3). After securing the file usage rights for the next exclusive control for each shared/non-ferrous file, the lock secured in F5-3 is released (F5-6).

In the case of a shared file> - When the file is unused The shared file management means 5 manages the information shown in the example of FIG. 7 in a shared area that can be referenced and updated between complex systems. Check whether the file name specified in the request to secure file usage rights is stored in CFI. If the same file name is not stored in CFI, it is assumed that the file usage rights have been secured, and the file name is stored in CFI. , the job name in CJI, the name of the divider system in use of the shared file in C81, the exclusive use classification (distinction between exclusive use and shared use) in CEL, and the information that the file is in use in C81, to the shared file management means 5. Remember.

- When the file is shared by other jobs If the shared file specified in the request to secure file usage rights is shared, and the same file name is stored in the CFI in Figure 7 for shared use, the file Assuming that you have secured the right to use 1, CFL is the file name, CJI is the job name, C8I is the computer system name in use of the shared file, (, E1 is the shared use exclusive use classification, and C81 is the information that the file is in use. is stored in the shared file management means 5. ・If the file is being used exclusively by another job, the file name specified in the request to secure file usage rights will be stored in the CF in Figure 7.
If the same file name is stored in I, the right to use the file cannot be secured. In this case, in order to give usage rights to the job that is waiting for the file usage rights to be released when the use of the file is completed, CF1 should be the file name, CJI should be the job name, and C8I should be the file waiting for the shared file usage rights to be released. The computer system name, the exclusive use classification of exclusive use in CF2, and the information that C81 is waiting for release of file usage rights are stored in the shared file management means 5.

<In the case of a non-shared file> - When the file is unused The non-shared file management means 9-1 manages the information shown in FIG. 8 in an area that can be referenced and updated within its own system. Check whether the file name specified in the request to secure file usage rights is stored in OF1. If the same file name is not stored in OF1, it is assumed that the file usage rights have been secured, and the file is stored in OF1. Name, job name in OJI, exclusive use classification (exclusive use, shared use classification) in CEI, and information that file is in use in O81 are stored in the non-shared file management means 9-1.

・If the file is shared by other jobs If the shared file specified in the request to secure file usage rights is for shared use, if the same file name is stored in the OFI in Figure 8 for shared use. , assuming that the right to use the file has been secured, file name in OF 1, job name in CJI, OEI
The non-shared file management means 9-1 stores information indicating the exclusive use classification of shared use and ○S1 indicating that the file is in use.

・If the file is being used exclusively by another job, the file name specified in the request to secure file usage rights is
, 1, the right to use the file cannot be secured. In this case, in order to give the usage rights to the job waiting for the file usage rights to be released when the file usage is completed, OF1 is the file name, O, Jl is the job name, and 0EI- is the exclusive use Information indicating that the exclusive use classification of the file is waiting for release of the file use right in O3I is stored in the non-shared file management means 9-1.

FIG. 9 shows exclusive control means 7-1 for shared/non-shared files.
12 is a flowchart of an example of processing for canceling file usage rights. The file shown in the exclusive information list 1 to 1 of the file used in the job shown in FIG. 4 instructed by the job selecting means 6-1 for extracting an execution job is a shared/non-shared file. , is determined using the shared/non-shared volume management means 8-1 configured from the information in FIG. 6 (F9-1
).

If the file is a shared file, a lock is secured to update the shared file management means 5 that manages the status of the shared file being used in the entire complex system (F9-
2 and F9-3). After performing the operation of releasing the file usage rights of the next exclusive control for each shared/non-ferrous file, the lock secured in F9-3 is released (F9-8).

In the case of a shared file> ・In order to release the file usage rights from the relevant job, the management information related to the relevant job is changed to the file name of CFI, job name of CJI, and calculation of shared file in use of C81 in Figure 7. The system name, the CEI exclusive use classification, and the information that the C81 file is in use are deleted from the shared file management means 5.

・File name C specified in the request to cancel file usage rights
F]-, if the same file name is stored in the CFI of another job, the right to use the file is given to the job waiting for the right to use the file to be released. In this case, from the job name of CJI and the name of the autopsy computer system waiting for release of the shared file usage rights of C and Sl, determine the computer system and job name that will notify that the file usage rights have been secured, and send the file to C8I. Information indicating that the file is in use is stored in the shared file management means 5.

In the case of non-shared files> ・In order to release the file usage rights from the relevant job, the management information related to the relevant job is changed to the file name of OFI, job name of OJI, exclusive use classification of CEI, and ○ in Figure 8.
The information that the file S1 is in use is deleted from the non-shared file management means 9-1.

・File name specified in the request to cancel file usage rights○
If F1 has the same file name stored in OF1 of another job, the usage right is given to the job waiting for the file usage right to be released. In this case, from the OJI job name,
A job name for notifying that the right to use the file has been secured is determined, and information indicating that the file is in use is stored in the non-shared file management means 9-1 in the O81.

According to this embodiment, only jobs that do not conflict with shared/non-shared files are scheduled in a complex system.
will be executed. As a result, job execution is not interrupted due to file usage rights being secured, making it possible to efficiently schedule jobs for each system making up the complex system.

〔Effect of the invention〕

As explained above, according to the present invention, jobs that use files in a complex system are controlled to be shared exclusively and shared between the complex systems, regardless of whether the file entity is shared or non-shared. Files can be controlled exclusively and shared within the local system, so
Processing overhead for exclusive/shared control can be reduced. In addition, ■ Jobs that use only non-shared DASD can be executed without being affected by the file usage status of jobs executed in other complex systems; Execution of a job that uses only the file is only affected by the file usage status of other jobs in its own system, and can reduce the probability that job execution will be interrupted due to contention for non-shared files. ■
Only jobs that do not conflict with shared/non-shared files are scheduled and executed on each computer system, so that job scheduling on each computer system making up the complex system can be performed efficiently. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the components of a control method showing an example of a job scheduling method in a complex system to which the method of the present invention is applied, FIG. 2 is a flowchart of an example of job schedule processing in a complex system, and FIG. A diagram showing an example of a job stream of a job to be executed, FIG. 4 is a diagram showing an example of exclusive information list information, FIG. 5 is a flowchart of an example of securing exclusive control means for shared/non-shared files, and FIG. 6 is a diagram showing an example of exclusive control means for shared/non-shared files.・A figure showing an example of non-shared volume management information, Fig. 7 is a figure showing an example of detailed information used by a shared file management means, and Fig. 8 is an example of detailed information used by one means of managing a non-shared file. FIG. 9 is a flowchart of an example of release processing of exclusive control means for shared/non-shared files. In the figure, 1-1.1-2...computer system, 2
-1.2-2... Spool file, 3-1.3-2...
...Non-shared DASD, 4.. Shared DASD, 5.. Shared file management means, 6-1.6-2. Job selection means for extracting execution jobs, 7-1.7-2.. Shared/non-shared DASD. Exclusive control means for shared files, 8-1.8-2・Shared・
Non-shared volume management means, 9-1.9-2... Non-shared file management means, 10-1.10-2... File allocation means. , 1゛)・ 箪

Claims (1)

[Claims] 1. Exclusive control means for shared/non-shared files to secure usage rights for files used in jobs, job selection means for extracting jobs to be executed from spool files, and shared/non-shared control for files used in jobs. At the start of a job, the job selection means performs exclusive control within multiple computer systems for each file used in the job, so that when the file used in the job is unavailable, the job selection means A job scheduling method for a complex system, characterized in that the job is returned to a spool file and execution of the job is started only when all files used in the job are available.