JPH05257802A - Assignment system for secondary storage record for paging - Google Patents

Abstract

PURPOSE:To increase the total number of records of the secondary storage files for paging which can be assigned over the entire system. CONSTITUTION:This system is equipped with a secondary storage file group control tables 9 which controls the number of empty records by secondary storage file groups that a job 1 uses for paging, a secondary storage file control table 10 which controls the empty records of the secondary storage files, and a secondary storage file group assigning means 7 which assigns secondary file group identifiers 2 having the identification numbers of the secondary storage file groups to the job at the start of the job; and the secondary storage files for paging are assigned by the secondary storage file group identifiers 2, page descriptors 4, the secondary file group control table 9, and secondary storage file control table 10 to increase the total number of the records of the secondary storage files which can be assigned over the whole system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paging secondary storage record allocation system in a system for implementing paging virtual storage management.

[0002]

2. Description of the Related Art Conventionally, in a system that implements virtual memory management by paging, secondary storage records for paging are allocated only by a page descriptor and a secondary storage file management table, and The total number of records that can be allocated in the secondary storage file has been determined based on the data length of the page descriptor.

[0003]

In the conventional paging secondary storage record allocation system described above, the paging secondary storage record is allocated only by the page descriptor and the secondary storage file management table. Therefore, there is a problem that the total number of records in the secondary storage file that can be allocated in the entire system is limited by the number of bits of the page descriptor.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a secondary storage record allocation system for paging that expands the total number of secondary storage file records that can be allocated in the entire system. And

[0005]

In order to achieve the above object, the paging secondary storage record allocation system of the present invention is a system for implementing virtual storage management by paging. The secondary storage file group management table that manages the number of empty records for each secondary storage file group that is used for backup, the secondary storage file management table that manages the empty records in the secondary storage file, and the secondary storage when the job starts A secondary storage file group assigning unit that assigns a secondary storage file group identifier having the identification number of the secondary storage file group to the job using the file group management table, and a secondary storage file group identifier and a secondary storage at the time of page-out. The file group management table and the secondary storage file management table are used to fill the page with empty records. A secondary storage allocation means shed Ri,
At the time of page-in, the secondary storage file group identifier and the page descriptor are used to include a secondary storage address acquisition unit that obtains a record assigned to a page.

[0006]

According to the paging secondary storage record allocating system configured as described above, the secondary storage file group identifier is allocated to the job by the secondary storage file group management table at the start of the job, and the secondary storage file group identifier is allocated at the time of page-out. An empty record is assigned to a page by the secondary storage file group identifier, the secondary storage file group management table, and the secondary storage file management table. Further, at the time of page-in, the record assigned to the page is obtained from the secondary storage file group identifier and the page descriptor.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. The present embodiment is a paging secondary storage record allocation system in a system that implements virtual storage management by paging.

In the figure, 1 is a job, 2 is a secondary storage file group identifier having an identification number of a secondary storage file group used by job 1 for paging, and 5 is a secondary storage file assigned to a page. File identifier,
Reference numeral 6 is a record number in a file of a record assigned to a page, and 4 is a page descriptor including a file identifier 5 and a record number 6 in a file.

Reference numeral 9 denotes a secondary storage file group management table for managing the number of empty records for each secondary storage file group, 10
Is a secondary storage file management table for managing empty records in the secondary storage file, 11 is a secondary storage file, 12
Is a record in the secondary storage file 11.

Reference numeral 3 denotes a secondary storage file group allocating means for allocating the secondary storage file group identifier 2 to the job 1 according to the secondary storage file group management table 9 at the start of the job 1, and 7 denotes the secondary storage file at the time of page-out. Secondary storage allocation means for allocating an empty record 12 to the page descriptor 4 by the group identifier 2, the secondary storage file group management table 9 and the secondary storage file management table 10, and 8 a secondary storage file group at the time of page-in It is a secondary storage address acquisition means for obtaining the record 12 assigned to a page by the identifier 2 and the page descriptor 4.

The feature of the embodiment of the present invention is that in FIG.
Secondary storage file group identifier 2, page descriptor 4, secondary storage file group management table 9 and secondary storage file management table 1 are assigned to the secondary storage record for paging.
This is to increase the total number of records in the secondary storage file that can be allocated in the entire system.

Next, the operation of the embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a flow chart for assigning the secondary storage file group identifier 2 to the job 1 at the start of the job 1.

First, all the secondary storage file group management tables 9 existing in the system are referred to, and the file group having the number of empty records required for executing the job 1 is searched (step 21). If there is a file group that satisfies the condition as a result of step 21, the file group identifier 2 of job 1 is set (step 23). As a result of step 21, if there is no file group satisfying the condition, it is determined that the secondary storage file group has not been allocated (step 25).

FIG. 3 is a flow chart for allocating an empty record 12 to a page at page-out. First, the secondary storage file group identifier 2 of job 1 is acquired (step 31). Next, the secondary storage file group management table corresponding to the secondary storage file group identifier 2 acquired in step 31 is referred to, and the secondary storage file management table 10 in which an unused record exists is searched (step 32).

Next, the file identifier 5 corresponding to the secondary storage file management table 10 found in step 32 is set in the page descriptor 4 (step 33). Next, the secondary storage file management table 1 found in step 32
The unused record 12 is searched for by referring to 0 (step 34). Finally, the in-file record number 6 corresponding to the unused record 12 found in step 34 is set in the page descriptor 4 (step 35).

FIG. 4 is a flow chart for obtaining the record 12 assigned to a page at the time of page-in.
First, the secondary storage file group identifier 2 of job 1 is acquired (step 41). Next, the file identifier 5 in the page descriptor 4 is acquired (step 42). Next, referring to the secondary storage file group management table 9 corresponding to the secondary storage file group identifier 2 acquired in step 41, the secondary storage file management table 10 corresponding to the file identifier 5 acquired in step 42 is searched. (Step 43).

Next, referring to the secondary storage file management table 10 found in step 43, the secondary storage file 1
1 is determined (step 44). Next, page descriptor 4
Acquire the record number 6 in the file in the file (step 4
5). Finally, the record 12 corresponding to the in-file record number 6 acquired in step 45 is searched (step 46).

[0018]

As described above, according to the paging secondary storage record allocation system of the present invention, the paging secondary storage record is allocated by using the secondary storage file group identifier and the page descriptor. By using the secondary storage file group management table and the secondary storage file management table, it is possible to increase the total number of records of secondary storage files that can be allocated in the entire system.

[Brief description of drawings]

FIG. 1 is a block diagram showing a system for allocating a secondary storage record for paging according to an embodiment of the present invention.

FIG. 2 is a flowchart for assigning a secondary storage file group identifier to a job at the start of the job.

FIG. 3 is a flowchart for allocating an empty record to a page at the time of page-out.

FIG. 4 is a flowchart for obtaining a record assigned to a page at page-in.

[Explanation of symbols]

 1 Job 2 Secondary Storage File Group Identifier 3 Secondary Storage File Group Allocation Means 4 Page Descriptor 5 File Identifier 6 File Record Number 7 Secondary Storage Allocation Means 8 Secondary Storage Address Acquisition Means 9 Secondary Storage File Group Management Table 10 secondary storage file management table 11 secondary storage file 12 record

Claims (1)

[Claims] 1. A system for implementing virtual storage management by paging, a secondary storage file group management table for managing the number of free records for each secondary storage file group used by jobs for paging, A secondary storage file management table that manages empty records in the secondary storage file and a secondary storage file group identifier that has the above-mentioned secondary storage file group identification number for the job by the secondary storage file group management table at the start of the job. By means of the secondary storage file group assigning means for allocating, and the secondary storage file group identifier, the secondary storage file group management table, and the secondary storage file management table at page-out
A secondary storage allocating unit that allocates an empty record to a page, and a secondary storage address acquisition unit that obtains a record allocated to a page by a secondary storage file group identifier and a page descriptor at the time of page-in. A characteristic secondary storage record allocation system for paging.