JPH04175840A - File storage system - Google Patents

Abstract

PURPOSE:To eliminate the necessity of the capacity of a magnetic disk from being conscious of by transferring a part of stored files to an outside storage medium based on operating experience data when the magnetic disk has a shortage of the capacity where a novel formed file is to be stored and storing the file in an area which is generated as a result. CONSTITUTION:When the use permission request 1 of the file comes, a file management control file 2 is referred to and a requested storage place and the capacity of the magnetic disk 3 are checked. When the file is a novel formed one, whether the magnetic disk 3 has the capacity to store the file is judged. When it has a shortage, a part of the stored files is transferred to the outside storage medium(a magnetic tape) based on operating experience data and the file is stored in the area which is generated as a result. Thus, there is no need to recognize the useable capacity of the magnetic disk.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a file storage method in computer processing.

[Conventional technology]

Conventionally, when using a magnetic disk, it was checked in advance to see if there was available capacity, and if it was not, a magnetic tape was used. For this reason, I was always conscious of the usable capacity of magnetic disks.

Furthermore, when magnetic tape was used, operations were performed manually.

[Problem to be solved by the invention]

In the conventional method, when using a magnetic disk, the usable capacity was checked in advance, which required extra time to prepare for computer processing. Moreover, if the actual capacity to be used is insufficient compared to the capacity as a result of the investigation, computer processing may terminate abnormally, causing trouble. Furthermore, due to the insufficient capacity of magnetic disks, a dedicated operator is required whenever magnetic tape is used.

[Means to solve the problem]

The file storage method according to the present invention, when creating a new file to be stored in a magnetic disk device, determines whether the magnetic disk has the capacity to store the file,
If the amount is insufficient, a part of the stored file is transferred to an external storage medium based on usage record data, and the file is stored in the resulting area.

(Embodiment) Next, an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, in one embodiment of the present invention, when a file fraud request 1 is received, a file management control file 2 is referenced. File management control file 2 contains
As shown in FIG. 2, file usage history data (for example, file name).

The requested storage location and the capacity of the magnetic disk 3 are checked with reference to this information.

If the requested file exists on the magnetic tape, or if the file is newly created and new capacity needs to be secured due to insufficient magnetic disk capacity, instructs the magnetic tape mount device 4 to request a magnetic tape mount. do. In response to this instruction, the automatic magnetic tape mounting device 4 takes out the corresponding magnetic tape from the collective magnetic tape rack 5 and mounts it.

Once the mount is fully aligned, the magnetic tape can be removed from the magnetic tape 3.
The work of transferring files to or from the magnetic disk 3 to the magnetic tape \ is performed, and the work of securing new capacity of the magnetic disk 3 is performed.

After the above work is completed, a file usage permit is issued.

The operation of this embodiment will be explained with reference to FIG.

When a file use permission request is received, it is determined whether the file is a newly created file (step 11). If it is a new creation, it is determined whether new magnetic disk capacity can be secured (step 12).

If it cannot be secured, copy the oldest file with the latest use date to the magnetic tape, and after copying, delete that file from the magnetic disk (step 3). Next, the information data of the file management control file for the copied file is updated (step 14), and step 1
Return to 2. If the file is secured in step 12, a file usage permission is issued (step 22).

If it is determined in step 11 that the file is not newly created, it is determined whether the corresponding file exists on the magnetic disk (step 5). If the file exists, update the information data in the file management control file for the file (step 1).
6) Issue file usage permission (step 22)
.

If it is determined in step 15 that the file does not exist, it is determined whether enough capacity can be secured to transfer the file from the magnetic tape to the magnetic disk (step 19); if it cannot be secured, the same processing as steps 13 and 14 is performed ( Steps 18 and 19), return to step 17. Step 1
Once you have secured the file in step 7, copy the file from the magnetic tape to the magnetic disk (step 20).

Next, perform the same process as step 14 (step 21)
, a file usage permission is issued (step 22).

〔Effect of the invention〕

As explained above, according to the present invention, there is no need to be conscious of the capacity of a magnetic disk, and it can be used as if it were unlimited. Also, problems with computer processing due to insufficient capacity will be eliminated.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the contents of a file management control file, and FIG. 3 is a flow chart showing the operation. 1... File use permission request, 2... File management control file, 3... Magnetic disk, 4... Automatic magnetic tape mounting device, 5... Collective magnetic tape rack.

Claims (1)

[Claims] When creating a new file to be stored in a magnetic disk device, it is determined whether the magnetic disk has enough capacity to store the file, and if there is insufficient capacity, some of the stored files are transferred to an external device based on usage record data. A file storage method characterized by moving the file to a storage medium and storing the file in the resulting area.