JPH05233412A - Recovery system for computer job - Google Patents

Abstract

PURPOSE:To prevent a data file from being destroyed by a misoperation by inhibiting a job from being re-executed from the start when the job is stopped and enabling only a job which copies a work file to a master file to be execut ed. CONSTITUTION:An execution job number file 2 is normally '0', and the number 1 of a job is set right before the work file is copied to the master file as the job '1' is executed and reset to '0' at the end of the job. When the execution of the job '1' is stopped during the copying of the work file to a master file, the contents of the file 2 become '1', so the re-execution of the job '1' is stopped at a step 1 even when tried. In this case, only the recovery job 3 can be executed and after the work file is copied to the master file, the file 2 is reset to '0'. Therefore, the data file is not destroyed wherever the execution of the job is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer job recovery method, and more particularly to a computer job recovery method for recovering a data file when a job ends abnormally during execution.

[0002]

2. Description of the Related Art In a conventional computer job recovery method, as shown in FIG. 2, a master file is saved before the job is executed, and if the job ends abnormally during execution, the master file is restored by the saved contents. And rerun the job.

[0003]

This conventional computer job recovery method requires an operation of saving the master file before executing the job, which may result in an operation error. Further, the operator checks whether the job has ended normally, and if it has ended abnormally, the master file is restored with the saved contents and the job is re-executed, which may cause an operation error. That is, there was always the risk of losing data files due to operational mistakes.

[0004]

According to the recovery method of a computer job of the present invention, in a job of copying a master file to a work file to update the work file and then copying the work file to the master file, A means to store how far the execution is progressing, a means to stop the execution of the job when the job stops while copying the work file to the master file, and a previous execution of the job masters the work file. Means for copying the work file to the master file when it stops while copying to the file.

[0005]

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

FIG. 1 is an explanatory diagram showing an embodiment of a computer job recovery system according to the present invention. In the figure, job 1 is a job for updating master file 1 and master file 2. The configuration of each step of job 1 is such that the master file is copied to the work file, the work file is updated, and the work file is copied to the master file.

The execution job number file 2 is normally 0, and the job number 1 is set immediately before the job 1 is executed and the work file is copied to the master file, and is reset to 0 at the end of the job. .

If the execution of job 1 is stopped while the work file is being copied to the master file, the content of execution job number file 2 is 1, so job 1
If you try to re-execute, stop at step 1. In this case, only the recovery job 3 of job 1 can be executed, and after copying the work file to the master file,
Reset the execution job number file to 0. Therefore,
No matter where the job execution stops, the data files won't get corrupted.

Even when there are a plurality of jobs, by constructing the jobs in the same manner, it is possible to restore the data files without breaking the data files even if any of the jobs stops during execution.

If the contents of the execution job number file 2 are not 0 at the start of job execution (step 1), the operator can be notified of the contents of the execution job number file 2 by a message on the screen to facilitate the recovery operation. become.

In a small computer such as a personal computer, a file update history is stored as a file recovery function, and when the job is stopped during execution, the contents of the file are returned to the contents before execution of the job. If it is not possible, the computer job recovery method of the present invention is particularly effective.

[0012]

As described above, according to the present invention, in a job for updating a file, the master file is copied to the work file, the work file is updated, and the work file is copied to the master file. If a job is stopped while copying a file to the master file, the job cannot be restarted from the beginning and only the job to copy the work file to the master file can be executed. Even if it stops inside, it has the effect that the data file will not be damaged by an operation mistake.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention.

FIG. 2 is an explanatory view showing a conventional example.

[Explanation of symbols] 1 job 2 execution job number file 3 recovery job

Claims (1)

[Claims] 1. In a job of copying a master file to a work file, updating the work file, and then copying the work file to the master file, a means for storing how far the execution of the job is progressing, and a work. A means for stopping the execution of the job when the job is stopped while copying the file to the master file, and a method for stopping the work file when the execution of the previous job is stopped when copying the work file to the master file. A method for recovering a computer job, comprising: means for copying to the master file.