JPS61228538A - File control system - Google Patents

Abstract

PURPOSE:To improve the independence properties from a disk device of a program and performing the allocation of files at a high speed, by using a control file to control the files contained in plural magnetic disk devices. CONSTITUTION:A retrieval processing part 21 of a file control mechanism 20 of a file control system receives the file allocation signal and the name of the file to be allocated from an input terminal 10 and reads the contents of a control file 51 of a group 50 of magnetic disk devices to a main memory 60 from an input/output controller 30 for magnetic disk. The names of all files included in the group 50 and addresses of the file identifiers and file levels are stored in the file 51 in the form of a table. Then the part 21 collates the table evolved to the memory 60 with the allocated file names given from the terminal 10 and gives a desired file to an allocation processing part 22. Then the part 21 reads the desired file level to the memory 60 and delivers the file allocation to an output terminal 40.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a file management method in an information processing system having a plurality of magnetic disk devices.

[Conventional technology]

Conventionally, in this type of information processing system, the program has to be aware of which magnetic disk device the target file is located on, which has the disadvantage of reducing the versatility of the program0. Even in an information processing system that eliminates these drawbacks, the drawback is that it takes a lot of time to find the desired file because files are searched sequentially on multiple magnetic disk drives. was there.

[Problem that the invention seeks to solve]

An object of the present invention is to provide a file management method that allows a program to quickly discover a target file without being aware of which magnetic disk device it is located on.

[Means for solving problems]

According to the present invention, there is provided a file management method characterized by having a file for managing files existing on all magnetic disk devices in an information processing system having a plurality of magnetic disk devices.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Referring to the drawings, one embodiment of the present invention includes an entry device group 50 and a main storage device 60.

The file management mechanism 20 includes a search processing unit 21 and an allocation processing unit 22, and the magnetic disk device 50 includes a management file 51 for managing all files existing on a plurality of magnetic disk devices, and a user (program) and various data files used by the program. Search processing 2
1 receives a file allocation request signal and the name of the file to be allocated from the input terminal 10, and then first transfers the contents of the management file 51 to the main storage device 60 via the magnetic disk input/output control device 30. Load. The management file 51 stores, in a table format, the name of the file, the identifier of the magnetic disk device in which the file exists, and the address where the file label is stored for all files existing in the magnetic disk device group 50. .

The search processing unit 21 compares and collates the table developed in the main storage device 60 with the name of the file to be allocated received from the input terminal 10, finds the target file, and sends it to the allocation processing unit 22. Pass information.

The allocation processing unit 22 reads the target file label into the main storage device 60 via the magnetic disk input/output control device 30 based on the information received from the search processing unit 21, and allocates the file. A signal is output to the output terminal 40 without any problem.

In this way, which magnetic disk device the target file resides on is centrally managed by the management file, so there is no need to be aware of this in the program.
unnecessary. In addition, since the magnetic disk device where the target file exists is determined directly from the management file,
Even if the number of magnetic disk devices increases, the time required to allocate files remains the same, allowing high-speed allocation.

Further, by integrating the system program for maintaining the area on the magnetic disk drive with the FI/L/II management method of the present invention, the information processing system can be operated more easily. For example, when a system program allocates a new file area on a certain magnetic disk device, the system program itself
By also maintaining the management file and registering the name of the new file, the user can use this file management method without being aware of the existence of the management file.

〔Effect of the invention〕

As described above, the present invention increases the independence of programs from devices, and also makes it possible to allocate files at high speed.

[Brief explanation of drawings]

The drawing is a block diagram showing an embodiment of the invention. Agent Patent Attorney Uchihara ,,/′-,,,. Day . BU name deaf ÷ n2ri XZt: grass SO

Claims (1)

[Claims] 1. A file management method in an information processing system having a plurality of magnetic disk devices, characterized in that a management file for managing files existing on the plurality of magnetic disk devices is provided.