JPH0496838A - File backup method - Google Patents

Abstract

PURPOSE:To back up a file together with related files of the corresponding generation by referring to a storage means to simultaneously back up files related to an update file at the time of updating the file. CONSTITUTION:A user program 21 registers the update file name in an update file name register file 23 simultaneously with updating of a file (c) 33. An update file backup control program 22 reads the file 24 to obtain the update file name and obtains backup file names (a) 31 to (c) 33 corresponding to the update file name from a register file 25 of file names to be backed up simultaneously with update. Files (a) 31 to (c) 33 are read in from a file group 30 based on backup file names (a) 31 to (c) 33 and are outputted to a file backup medium 23. Thus, the file is returned to the state of several generations before at a time.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a file backup method for a database composed of a plurality of mutually related files, and in particular, to a file backup method for maintaining the consistency of related files when updating files. This invention relates to a file backup method suitable for.

[Background Art] Conventionally, information in a database system is centrally managed and used by multiple programs, so the data needs to be maintained correctly. Furthermore, in a database composed of a plurality of files that are related to each other, consistent data is required, including the relationships between the files.

For example, data for hardware design includes a plurality of files that are related to each other, such as a logical information file and a connection information file, and these files constitute a database. In such a database, when backing up updated files, only physically updated files are backed up, and files that are not physically updated are not backed up even if they are related to updated information.

Therefore, if a file failure occurs, it takes time to recover from the backup medium.

For example, if you want to restore file A to an older version than its current version, you must use the backup medium for version A and the medium that backed up the corresponding file B (related to file A but not physically updated). Need to find and recover.

A related method of this type is, for example, Japanese Unexamined Patent Publication No. 1-171042.

[Problem to be solved by the invention] In the above-mentioned conventional technology, no consideration is given to the relationship between files, and when an attempt is made to simultaneously recover a file from several generations ago and a file related to it, the corresponding generations must be manually restored. The problem was that I had to search for files related to .

SUMMARY OF THE INVENTION An object of the present invention is to provide a file backup method that can solve these problems and simultaneously back up related files of the corresponding generation when backing up an updated file.

[Means for Solving the Problems] In order to achieve the above object, the file backup method of the present invention provides a file backup method based on the relationships between files in a database having a plurality of mutually related files.
Equipped with a means (simultaneous update backup file name registration file) for storing file name information of files to be backed up together with updated files in advance;
The feature is that files related to the updated file are simultaneously backed up by referring to the storage means.

Further, in a computer system having the above-mentioned database and connected via a network, a means (
The system is characterized in that it includes a file name registration file (simultaneous transfer at update time), and when a file is updated, the update file and related files are simultaneously transferred by referring to the storage means.

[Operation] In the present invention, the update file backup control program reads the update file name registered in the update file name registration file and the update simultaneous backup file name registration table, and obtains the file name to be backed up. You can back up not only files but also related files at the same time.

Therefore, when updating files in a database that includes a plurality of mutually related files, consistency between the updated file and its related files can be maintained.

Example C) An embodiment of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 2 is a block diagram of a data storage system according to a first embodiment of the present invention.

In FIG. 2, 21 is a user program, 30 is a file group, 24 is an update file name registration file, 22 is an update file backup control program, 25 is a simultaneous backup file name registration file when updating, and 23 is a file backup medium. . Further, the file group 30 includes files (a) to (f) 31 to 36.

FIG. 3 is an explanatory diagram of a simultaneous update backup file name registration file in the first embodiment of the present invention.

The simultaneous update backup file name registration file 25 of this embodiment stores backup file names corresponding to updated files as a simultaneous update backup file name registration table 25a.

Next, the operation when the file (c) 33 in FIG. 2 is updated will be described.

FIG. 1 is a flowchart showing a file backup method in the first embodiment of the present invention. First, the user program 21 updates the file (c) 33, and at the same time writes the updated file name in the updated file name registration file 24. given name(
The file (c) 33) is registered (101).

Next, control is transferred to the update file backup control program 22, reads the update file name registration file 24,
Obtain the updated file name (file (c) 33). Furthermore, the updated file name registration file 24 is cleared and the updated file name (file (c) 33) is deleted (102).

Next, the update file backup control program 22 executes the update simultaneous backup file name registration file 2S.
reads the update simultaneous backup file name registration table 25a and enters the update file name (file (c) 3
The backup file names (files (a) to (c) 31 to 33) corresponding to 3) are obtained (103).

Finally, update file backup control program 22
is the backup file name (file (a) ~ (c)
31 to 33), from file group 30, file (
A) to (c) 31 to 33 are read and output to the file buffer storage medium 23 (104).

(Second Embodiment) In this embodiment, a file backup method in a computer system connected via a network will be described.

FIG. 4 is a configuration diagram of a database system in a second embodiment of the present invention.

In FIG. 4, 45 is a central processing unit on the update side, 44 is a communication control device, 60 is a file group, 24 is an update file name registration file, 47 is a file name registration file that is simultaneously transferred at the time of update, and 41 is a central processing unit on the receiving side. A processing device, 43 a communication control device, and 50 a file group.

The central processing unit 45 also includes a user program 21 and an update file transmission control program 46 .

Further, the file group 60 includes files (A) to (F) 61 to
Consists of 66.

Further, the central processing unit 41 has an update file reception control program 42.

The file group 50 also includes files (a) to (f) 51 corresponding to each file (A) to (F) of the file group 60.
~56.

Next, the operation when the file (C) 63 in FIG. 4 is updated will be described.

FIG. 5 is a flowchart showing a file backup method in the second embodiment of the present invention.

First, the user program 21 updates the file (C) 63 and at the same time registers the updated file name (file (C) 63) in the updated file name registration file 24 (50
1).

Next, control is transferred to the update file transmission control program 46, which reads the update file name registration file 24 to obtain an update file name (file (C) 63).

Then, clear the update file name registration file 24,
Delete the updated file name (file (C) 63) (502
).

Next, the update file transmission control program 46 obtains transfer file names (files (A) to (C) 61 to 63) from the update simultaneous transfer file name registration file 47 and obtains the transfer file names (files (A) to (C) 61 to 63) and
3), based on this, file (
A) to (C) 61 to 63 are read and the communication control device 43
．． 44 to the update file reception control program 42 (504).

Upon receiving this, the update file reception control program 42
is the received file (files (A) to (C) 61 to
63) and files (a) to (c) 51 to 53,
Back up these files (505) 6 [Effects of the Invention] According to the present invention, not only updated files but also files related to updated files are backed up at the same time, so files from several generations ago can be backed up. When restoring files, there is no need to search for files of the relevant generation and related files of the corresponding generation from a plurality of backup media, and it is possible to restore files to -degrees.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing a file backup method in a first embodiment of the present invention, FIG. 2 is a configuration diagram of a database system in the first embodiment of the present invention, and FIG. 3 is a flowchart showing a file backup method in a first embodiment of the present invention. An explanatory diagram of the simultaneous backup file name registration file during update in the example, FIG. 4 is a configuration diagram of the database system in the second embodiment of the present invention, and FIG. 5 is a file backup method in the second embodiment of the present invention. It is a flowchart which shows. 21: User program, 22. Update file backup control program, 23: File backup medium, 24: Update file name registration file, 25. Update simultaneous backup file name registration file, 25a: Update simultaneous backup file name registration table. 30. File group, 31-36・File (a)-(e), 41
．． 45 central processing unit, 42. Update file reception control program, 43. 44 Communication control device, 46/Update file transmission control program, 47 Simultaneous transfer file name registration file during update, 50. 60 + file group, 51
-56: Files (a) - (f), 61 - 66, Files (A) - (F).

Claims (1)

[Claims] 1. In a file backup method for a database having a plurality of mutually related files, there is provided means for pre-storing file name information of files to be backed up together with updated files based on relationships between files. 1. A file backup method, comprising: when updating a file, referring to the storage means and backing up files related to the updated file at the same time. 2. In the file backup method for a computer system having a database and connected via a network as claimed in claim 1, file name information of a file to be transferred via a network together with an updated file is prepared in advance based on the relationship between the files. 1. A file backup method, comprising: storage means; when a file is updated, the storage means is referred to and an updated file and a file related to the updated file are simultaneously transferred.