JPS59180646A - Reconnecting method of magnetic tape device - Google Patents

Abstract

PURPOSE:To use a magnetic tape (MT) device effectively and to use job execution efficiently by enabling a job using an MT to be interrupted or restarted at its execution. CONSTITUTION:When an instruction interrupting the job in execution is applied by a job execution processing part 5, a system control part 10 actuates a job interruption processing part 7 for a job in execution to perform interruption processing and then makes a job execution processing part 5 start new job. When the interrupted job is to be restarted, the system control part 10 allows a job restart processing part 9 to execute restart processing and the job execution processing part 5 to restart from the contents at the time of interruption to restart the execution of the interrupted job.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides an electronic computer that executes a job that transfers all the information to a magnetic tape. Item 6 is related to the method.

[Prior art and problems]

FIG. 1 is a diagram showing an outline of the configuration of a computer system to which an MT device is connected. In FIG. 1, 1 is the main storage (MS),
2 is a central processing unit (Cp TJ; Central
processing [Jnit), 3 Fi Cocoa: / -l, 4 is MT device (Magnetic 'l'
apeUnit (magnetic tape device).

Although the number of MT devices installed in electronic computer systems has decreased overall, there are still many jobs that use AIT. A job that uses all MT.

Once its execution has begun, it remains in its grip on the MT device until its execution-AZ ends. FIG. 1 shows an outline of the general configuration of an electronic computer system equipped with an MT device. In Figure 1, for example, if a job that uses MTk is being executed under instructions from an operator from console 3, and another urgent job that uses MTk enters in the middle, conventionally, the I had no choice but to either cancel the job or wait for the running job to finish. That is, conventionally, if the MTk used by the job was removed during execution of the job, the job would end abnormally and the execution would have to be restarted from the beginning.

Therefore, if the number of MT devices installed is small (・), it will not be possible to interrupt, which will be very inconvenient. There are problems such as wasted processing.

[Purpose of the invention]

The present invention is based on the above considerations, and its entire purpose is to suspend and resume execution of jobs that use MT.

In a computer system that executes all jobs that use magnetic tape, the positioning of the magnetic tape is used by the running job to store all information. When the job is completely interrupted, the magnetic tape position information at the time of interruption of the job is saved from the update area. The above magnetic tape positioning is for the job execution processing unit that processes all the contents of the update area, and the positioning of the magnetic tape used by the job being executed is for all information. A job suspension processing unit that performs the suspension processing of the job, and a job restart processing unit that restores the magnetic tape positioning information used by the suspended job from the above save area to the above magnetic tape positioning update area and resumes the suspended job. The system control unit includes a processing unit and a system control unit that performs overall control, and when the Jeddah execution processing unit gives an instruction to interrupt the job being executed, the system control unit interrupts the execution of the job by the job execution processing unit. Operate the job interruption processing section to perform interruption processing for a job, and when an instruction to restart all suspended jobs is given, operate the job restart processing section to perform all restart processing for the suspended job, and then The present invention is characterized in that the job execution processing unit is then operated to perform all the processes of restarting the execution of the job.

[Embodiments of the invention]

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

FIG. 2 is a diagram illustrating the entire process flow. In the figure, 5 is a job execution processing section, 6 is an update area for MT positioning, 7 is a job interruption processing section, 8 is a save area, 9 is a job restart processing section, and 10
is the system control unit, 11 is the console, 12 is the MT device, and 13 and 14 are the MT? show.

In FIG. 2, the M'T position update area 6 contains information about the job being executed (for example, 1. The number of tape marks indicating data block divisions on the medium and the data The content indicating the position of the record in the block, that is, the information indicating the position of the file and record) is updated and stored in the main hall (area, the save area 8 is
When a job is interrupted, the MT positioning is stored in the update area 6.The MT positioning information regarding the interrupted job is temporarily saved (
It is an area. The job execution processing unit 5 normally has the function of controlling jobs and managing execution costs, and the MT positioning during job execution is in the update area 6.
counter update). The job interruption processing unit 7 performs job interruption processing when an emergency zip occurs and, for example, an operator issues an instruction to interrupt the currently running job from the console 11, and the MT positioning for the interrupted job is stored in the update area 6. The stored MT positioning is in the total information save area 8
This process performs the process of saving the data to Job restart processing section 9
When resuming a suspended job, the MT positioning for the suspended job may be restored to the all information save area 8, or the MT positioning is restored to the update area 6, and the suspended job is fully restarted by repositioning it to the MTt-interrupted position. It performs processing to make it happen. The system control unit 10 controls the entire system, receives instructions from the console 11, and receives instructions from the MT.
Based on the information from the device 12, the job execution processing section 5, job interruption processing section 9, and job restart processing section 9 are controlled, and the console 11. Necessary information is output to the MT device 12. For example, when a job interruption instruction is given, the system control section 10 causes the job interruption processing section 7 to perform all interruption processing, and then causes the job execution processing section 5 to start a new job.

In addition, in the case of restarting all of the interrupted jobs, the system control unit 10 causes the job restart processing unit 9 to complete the restart processing, and then causes the job execution processing unit 5 to restart all of the interrupted jobs from the contents at the time of interruption.

Next, as job B enters while job A is being executed, job A is completely interrupted, job Btl- is executed, and job A' is restarted after job B is finished. Refer to Figure 3 for the process flow. I will explain.

■ An instruction to interrupt job A is issued by the operator.

■ Perform all interruption processing for J1B A. Here, information is saved for MTO positioning, and an MT removal instruction is issued.

■ The operator removes the MT "n" used by job A and sets the MT "B" used by job B.

■ Job Bt-Execute. When job B finishes, MT
A removal instruction will be issued.

- The operator removes MT "B" used by job B and sets MT "A" used by job A.

■ An instruction to restart job A is issued by the operator.

■ Perform job A restart processing. Here, the MT is located by giving an instruction, and the MT is repositioned based on the information.

■ Resume execution of job A.

As described above, in the present invention, when a release request (interruption instruction) is issued by an operator instruction or the like, the job is temporarily held, and the MT in use is unloaded to release the apparatus.

Then, when a recombination instruction (resume instruction) is issued, the control information of the previously mounted volume (for example, V L ;
■olume I, abet) Compare the information with the recombined volume information, and if it is valid, set the block name at the time of release) '(1;'ile 0ontro
lB1ock; Contents stored in F CB, etc.)
Reposition based on , and resume job execution.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, it is possible to interrupt a job in progress, execute all other jobs that use M'l, and then resume execution of the interrupted job from the point of interruption. Therefore, even if the number of MT devices is small, it can be executed in interrupt processing of other jobs.
It is possible to make effective use of the MT device and efficiently execute jobs.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an outline of the configuration of an electronic computer system to which all MT devices are connected, and FIG. 2 shows the implementation of the present invention. 1... Main storage device (MS; Main 3tor
age ), 2...Central processing unit (CPU;
:'central processingUnit),
3 and 1i-=+y sole, 4 and 12-MT device (Mag
netic Tape'(Jnit; magnetic tape device), 5... Job execution processing section, 6... MT positioning is update area, 7... Job interruption processing section, 8... Save area, 9... - Job restart processing unit, 10... system control unit, 13 and 14... MT. Patent Applicant: Fujitsu Limited Representative Patent Attorney Yotsube Kyotani

Claims (1)

[Claims] In a computer system that executes jobs that use magnetic tape, the positioning of the magnetic tape used by the job being executed is stored in an update area;
When a job in progress is interrupted, the magnetic tape position information at the time of interruption of the job is saved as a save area from the update area, which controls job execution and control, and also executes the job. Accordingly, the magnetic tape positioning is performed by a job execution unit that updates the contents of the update area;
The positioning information of the magnetic tape used by the currently running job is used by the job interruption processing section, which saves information from the update area to the upper evacuation area and interrupts the job. The system includes a job restart processing unit that performs all the restart processing of interrupted jobs by restoring information from the save area to the magnetic tape position update area for magnetic tape positioning, and a system control unit that performs overall control. When the control unit receives an instruction to suspend all jobs currently being executed by the job execution processing unit, the control unit operates the job suspension processing unit to perform all suspension processing for the job being executed by the job execution processing unit, and then suspends the job. When an instruction is given to restart the currently suspended job, the job restart processing unit is operated to restart the suspended job, and then the job execution processing unit fciAr is created to restart the suspended job.