JPS61114332A - File back-up processing method - Google Patents

Abstract

PURPOSE:To back-up a magnetic tape or a flexible disk regardless of the file editing by copying physically and saving the file area of the back-up side. CONSTITUTION:The file information of the back-up side is written physically to an area of the backed-up side and then read physically. When the files of the pack-up side are all read, these files are closed. Then the files of the backed-up side are also closed. In case the backed-up file is restored, the file is opened to the output light in an output mode by the file information of the back-up side. Hereafter the file areas are copied physically in the same way. Then the file information is written to a file control table when said physical copying operation is through.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a file backup processing method for backing up files in a continuous area on a magnetic disk of a computer system.

[Conventional technology]

This type of traditional file backup process involves a data management program opening, reading, and
This is done by writing and closing, and this is done by the second
This will be explained in detail using the flowchart shown in the figure.

First, in step (b), open the backup source file in input mode. It is assumed that a file area etc. can be obtained by this opening, and then in step 4, the backup destination file is opened in output mode (wRrrg) according to the number of input files to be generated.

Next, in step a, the backup source file is read as a code, and in step a, it is determined whether or not the backup source input data is finished.

If it is determined in step (4) that the input data is not finished, the backup source code read in the step file is written to the backup destination file.

Next, repeat steps 11:11, (4), (to) until the end of the backup source file (go
If F) is detected, the backup source file is closed in step α6), and then step a'F)
The backup destination file is closed, and the backup process for one 7 isle is completed.

[Problem that the invention seeks to solve]

The above-mentioned conventional processing method uses data management, so there are two primary problems.

(,) Please note that files other than sequentially organized files cannot be backed up to magnetic tape or flexible disks.

(value) Data management is processed in logical units called records, so the processing speed is slower and faster than copying of physical areas. This invention was made to solve these problems, and aims to provide a file backup processing method that can perform high-speed backup processing for files on magnetic tapes and flexible disks, regardless of file organization. shall be.

[Means for solving problems]

The file backup processing method according to the present invention physically copies the file area based on knowing the file area of the backup source and saves the attribute information of one file at the same time.

[Effect]

In this invention, high-speed processing is performed by physically copying the file area, attribute information is saved together, and backup can also be performed on magnetic tape or flexible disk.

〔Example〕

FIG. 1 is a flowchart showing an embodiment of a file reference backup processing method according to the present invention.

In FIG. 1, first, in step 211, the backup source file is opened in input mode (INPUT), and then, in one step, the size of the attribute information is added to the backup source area, making it 9 in size. Output file of backup destination file in sequential format (0σTP
Next, in step ■, physically write the backup source file information into the backup destination area, and then, in step -, physically read the backup source file area. Step) determines whether reading of the backup source file has finished (moF), and if not, physically writes the read data to the backup destination file area in step (moF), and then , step example, ), repeat the process of (goods).

After all the backup source files have been read through these processes, the backup source files are closed in step 1, and then the backup destination files are closed in step -.

On the other hand, when restoring a backup file, the output mode (0) depends on the file information of the backup source.
σTPUT) to copy the file to the output light when opening it. After the copy is completed, the file information is written in the file management table, and the backup file and restored file are closed.

In the above embodiment, the attribute information is obtained when opening the buffer lag source file, but if this attribute information cannot be obtained, it is determined to be obtained by another appropriate method.

Furthermore, physical information in the backup file, such as information such as the data pointer in the index section of an index file indicated by a physical disk address, is made relative at the time of backup and converted into a physical disk address at the time of restoration.

Furthermore, when backing up n files at once, file information may be output individually, or -
You may also manage by outputting the pattern.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, since the file area is physically copied, high-speed processing is possible because there is no overhead caused by a data management program, and attribute information is also saved. This has the advantage that files can be backed up to magnetic tape or flexible disks regardless of file organization.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing an embodiment of the present invention).
FIG. 2 is a flowchart showing a conventional file backup processing method.

Claims (1)

[Claims] In a computer system in which files are located in a continuous area on a magnetic disk, when backing up the file, the file area is physically copied and attribute information of the file is also saved.・How to process backups.