JPH03225444A - File control job start system - Google Patents

Abstract

PURPOSE:To prevent data from being absent and necessary data from being erased and to accurately grasp the state of the system by starting a recovery job immediately when the overflow of a file is detected. CONSTITUTION:An analyzing means 12 detects the name of a file where an overflow occurs from the file name control table 15 according to a code when an overflow detecting means 11 detects the overflow. A control means 13 retrieves whether or not the file name analyzed by the analyzing means 12 is present in control information that a 1st storage means 16 holds and determines the recovery job started with the control information when the file name is present. A job start means 14 starts the recovery job determined by the control means 13 by a command procedure stored in a 2nd storage means 17. Consequently, neither data absence nor the erasure of necessary data is caused and the state of the system can accurately be grasped.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a system that uses a plurality of files cyclically or uses overflow time - so-called overprinting in which data is written from the beginning of the file. In particular, the present invention relates to a method for starting a job for recovery when a file overflow is detected.

[Conventional technology]

In computer systems, it is common practice to store various data processed by a computer in files on an external storage medium.

As for how files are used, when a file overflows, data is written using another file, and data is written from the beginning of the same file, which is called overprinting.

Conventionally, when an operator detects a file overflow, the operator initiates a recovery job such as saving the overflowed file, and a control job that manages system operations detects the file overflow using the console. The method was to detect it by receiving a message and start a recovery job.

[Problem to be solved by the invention]

In these conventional methods, many other console messages are generated when the operator overlooks a file overflow, or because the control job that manages system operations uses console messages as an opportunity to start a recovery job. If the overflow message is not received and there is a time lag between when an overflow actually occurs and when a recovery job is started, data may be lost or necessary data may be deleted.

[Means for Solving the Problems] According to the present invention, in a file recovery system used in a computer system, a first storage means for storing management information such as file names and job names required when a file overflows; , a second storage means for storing a group of command procedures when starting a job, a file name management table for managing file names and codes,
overflow detection means for detecting an overflow of a file; analysis means for analyzing the code detected by the overflow detection means; and control for determining, by the first storage means, a recovery job for the file name analyzed by the analysis means. and job starting means for starting a recovery job determined by the control means from the second storage means, wherein when a file overflows, a recovery job corresponding to the overflowed file is started. A controlled job starting method is obtained.

〔Example〕

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, in a file control job starting method 1 according to an embodiment of the present invention, an overflow detection means 11
, an analysis means 12 , a control means 13 , a job starting means 14 , a file name management table 15 , a first storage means 16 , and a second storage means 17 .

The file name management table 15 is a management table for storing codes detected at the time of overflow and file names corresponding to the codes.

The first storage unit 16 is a storage unit for storing management information such as a file name and a recovery job name corresponding to the file name, which are required when a file overflows.

The second storage means 17 is a storage means for storing a group of command procedures to be actually started.

The process of writing data to a file is performed by the input/output management means 2 included in the computer system, but when the input/output management means 2 detects an overflow of the file, the input/output management means 2 detects the overflow in the overflow detection means 11. Notify the code of the time.

The analysis means 12 detects the overflowed file name from the file name management table 15 based on the code when the overflow was detected by the overflow detection means 11.

The control means 13 searches whether the file name analyzed by the analysis means 12 exists in the management information held in the first storage means 16, and if it exists, starts it from the management information. Decide on recovery jobs.

The job starting means 14 stores the recovery job name determined by the control means 13 in the second storage means 17, and starts the recovery job using a command procedure.

Referring to FIG. 2, the file name management table 15 stores codes returned by the overflow detection means 11 and file names in association with each other.

Referring to FIG. 3, the first storage means 15 can be used to alternately use multiple files each time a file overflows, or to rewrite from the beginning of the same file when a file overflows. The file name of the existing file and the name of the recovery job to be started in the event of an overflow are stored in association with each file name.

For example, by using the above file control job startup method 1,
When file B overflows, a recovery job is started to save the file, and when file B overflows, a recovery job is started to output the contents of the file to a list.

〔Effect of the invention〕

As explained above, the present invention includes a file name management table, a first storage means, a second storage means, an overflow detection means, an analysis means, a control means, and a job starting means, so that when a file overflow is detected, Since the recovery job is started immediately, it is possible to prevent data loss or necessary data from being deleted, and it has the effect of accurately grasping the system status.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of a file control job starting method according to an embodiment of the present invention, and Fig. 2 illustrates the structure of a file name management table held by the file control job starting method in Fig. 1. FIG. 3 is a diagram illustrating the structure of the first storage means held by the file control job starting method in FIG. 1.

Claims (1)

[Claims] In a file recovery system used in a computer system, there is a first storage means that stores management information such as file names and job names required in the event of a file overflow, and a second storage means that stores a group of command procedures for starting a job. a storage means, a file name management table for managing file names and codes, an overflow detection means for detecting file overflow, an analysis means for analyzing the code detected by the overflow detection means, and an analysis means for analyzing the code by the analysis means. control means for causing the first storage means to determine a recovery job for a given file name; and job activation means for activating the recovery job determined by the control means from the second storage means; A file control job starting method characterized by starting a recovery job corresponding to an overflowed file.