JPH02282840A - Journal output system - Google Patents

Abstract

PURPOSE:To improve the journal output processing performance by outputting with dispersion the journal output requests received from plural jobs via the journal buffers corresponding to each user job based on the job identification information. CONSTITUTION:A job register part 30 sets the instructed job identification information to a job identification information table 40. When a journal output request is received from a user job holding part 10, a journal editing part 60 decides the end of all journal outputs. If all journal outputs are not finished yet, a table search part 61 searches the job identification information entries 41 and 42 to acquire the corresponding journal buffers 51 and 52. Then the journal record is outputted via the journal buffer set previously opposite to the corresponding user job. Thus the journal output processing performance is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a journal output method for a computer system in which a plurality of user jobs update user files while outputting updated journals.

[Conventional technology]

Conventionally, in this type of journal output method, all jobs are output to one journal output medium, or journals are distributed and output for each device where user files are placed.

[Three Problems to be Solved by the Invention] The conventional journal output method described above deteriorates the performance of journal output processing if all jobs are output to one journal output medium, or if output is distributed to each device. This method has the disadvantage that multiple series of journal tapes must be used when performing job-by-job recovery, making management of journal tapes complicated.

[Means for Solving the Problems] The journal output method of the present invention identifies jobs in advance by providing job identification information including job names and job classes that can identify jobs associated with each of a plurality of journal buffers set in a computer system. means for registering in an information table; and journal editing means for inspecting the job identification information table and buffering journal records in journal buffers that match job identification information when the user job requests journal record output.

It has a journal output means for distributing and outputting journal records buffered for each user job in each journal bar to arbitrary media.

(1) When there is a journal record output request from a user job, the journal editing means checks the job identification information table and outputs the journal output part i through a journal buffer set in advance to correspond to the user job. j Upper blade.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the journal output method of the present invention, and FIGS. 2 and 3 are flowcharts showing the operation of the embodiment of FIG. 1.

The user job holding unit 10 stores a plurality of user jobs 11, 1
It holds 2.13. The user file holding unit 20 holds user files 21.22 updated by user job I+, 12.13. Ji51bR
31 unit 30 sets job identification information related to user job I1.12.13 in job identification information table 40 as job identification information entry 41.42. The buffer section 50 has journal buffers 51 and 52 each storing journal records.

When the journal editing section 60 receives a journal output request from the user job II, 12.13 of the user job holding section IO, it causes the table search section 61 to search the job identification information table 40, and searches the user job I+, which requested the journal output. When journal buffers 51 and 52 corresponding to 12.13 are detected, the buffering processing unit 62 is notified of the correspondence. Buffering processing section 62
The user job is +1.12 based on the notified response.
．． The journal records requested from I3 are stored in the corresponding journal buffers 51 and 52, and when the corresponding journal buffers 5 and 52 are full, the journal output processing sections 81 and 82 of the journal output section 80 are filled. It requests the output of journal buffers 51 and 52.

The journal output unit 80 has journal buffers 51 and 52.
The journal output processing units 81.82 respectively corresponding to the journal output processing units 81.82 are outputted to the magnetic tapes 71.72 of the magnetic tape device 70, respectively, and the contents held in the journal buffers 51.52 are output to the magnetic tapes 71.72 of the magnetic tape device 70, and the corresponding journal output processing units 81.5
Leave 2 blank.

Next, the operation of this embodiment will be explained with reference to FIGS. 2 and 43.

Job identification information registration The job registration unit 30 that performs the job stores the instructed job identification information in the job identification information table 40.
(step 100). When the user job holding unit IO issues a journal output request, the journal editing unit 60 determines whether all journal output has been completed (step 200), and if not, the table search unit 61
searches the job identification information entries 41 and 42 and acquires the corresponding journal buffer 51 and 52 (step 220). Next, the journal record buffering processing unit 62 determines whether the journal buffer is free (
Step 230), if it is full, the journal output unit 80
The journal output unit 80 outputs the journal buffer to make the journal buffer empty (step 260). If there is space, the buffering processing unit 62 of the journal editing unit 60 buffers the journal records (step 24).
0). After these operations are completed, the user job holding unit IO updates the user file (step 250).
. The journal editing unit 60 determines the end of all journal output (step 200), and if it is the end, f
The process ends when the value is constant.

(Effects of the Invention) As described in 1-1 above, the present invention allows journal output requests from a plurality of jobs to be sent through a journal buffer associated with each user job based on job identification information.
By distributing output, the performance of journal output processing is improved, and journal tapes can be easily selected when recovering files with emphasis on jobs, making recovery processing faster and easier to manage. effective.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an embodiment of the journal output method of the present invention, and Figures 2 and 3 are? Fig. A1 is a flowchart showing the operation of the embodiment shown in Fig. A1; 10... User job holding unit, II, 12.13... User job, 2D... User file holding unit. 21, 22... User file, 30... Job a record section, 40... Job identification information table, 41, 42... Job identification information entry, 50...
Buffer section, 51. 52... Journal buffer, 60... Journal editing section, 61... Double search section, 62... Buffering processing section, 70-... Magnetic tape device, 7], 72 ···Magnetic tape. 80... Journal output unit; 81, 82... Journal output processing unit.

Claims (1)

[Claims] 1. In a computer system in which a plurality of user jobs update a user file while outputting an updated journal, it is possible to identify jobs associated with each of a plurality of journal buffers set in the computer system. means for registering job identification information including a job name and job class in a job identification information table in advance, and a journal buffer that checks the job identification information table and matches the job identification information when a journal record output request is made from the user job; A journal editing means for buffering journal records in each journal buffer, and a journal output means for distributing and outputting the journal records buffered for each user job in each journal buffer to arbitrary media. Journal output method.