JP2573577B2 - File access device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed label access method, and more particularly to a high-speed label access method for accessing a label on a low-speed access medium at a high speed using a high-speed access medium.

[Conventional technology]

Conventionally, in this type of label access method, when it is necessary to search for a label at the time of file creation or file access, a plurality of labels existing on the low-speed access medium are actually input plural times and checked one by one. By doing so, the requested label was searched.

[Problems to be solved by the invention]

In the above-described conventional label access method, when it is necessary to search for a label at the time of file creation or file access, a method is employed in which labels on the low-speed access medium are actually input one by one and checked. There is a disadvantage that the input processing for the label on the access medium is repeated many times, and the processing time is greatly lengthened.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to make it possible to access a label on a low-speed access medium at high speed using fixed-length label information including a file name and a label address stored on a high-speed access medium. It is to provide a label high-speed access method.

[Means for solving the problem]

A file access device according to the present invention comprises: a low-speed access medium storing one or a plurality of files and a label including a file name and file area information corresponding to each file; and a file name of a file on the low-speed access medium. A high-speed access medium for storing fixed-length label information including a label address of a label on the low-speed access medium; and a file name stored on the high-speed access medium when a label on the low-speed access medium is searched. Label information searching means for searching for the corresponding label information obtained, and when the corresponding label information is searched on the high-speed access medium by the label information searching means, the low-speed access is performed using the label address in the label information. Label input means for directly inputting a label on a medium, and the label When the corresponding label information on the high-speed access medium is not searched by the information search means, a label is referred to the low-speed access medium by referring to the label address in the last label information stored on the high-speed access medium. And label information storage means for storing label information of the label on the high-speed access medium when a label is output on the low-speed access medium by the label output means. I have.

[Action]

In the label high-speed access method of the present invention, the low-speed access medium stores one or a plurality of files and stores a label for recording file identification information such as a file name corresponding to each file. Fixed-length label information consisting of the file name of the file of the low-speed access medium and the label address of the label on the low-speed access medium is stored. When the label information search means searches for the label on the low-speed access medium, high-speed access is performed using the file name. The corresponding label information stored on the medium is searched, and when the label input means searches the corresponding label information on the high-speed access medium by the label information searching means, low-speed access is performed using the label address in the label information. The label on the medium is directly input, and the label output unit is used by the label information search unit. When the corresponding label information on the high-speed access medium is not searched, the label is directly output on the low-speed access medium by referring to the label address in the last label information stored on the high-speed access medium, and the label is output. The information storage means stores the label information of the label on the high-speed access medium when the label is output on the low-speed access medium by the label output means.

〔Example〕

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

FIG. 1 is a configuration diagram showing one embodiment of the present invention. The label high-speed access method according to the present embodiment includes a job A for issuing a label creation request and a search request, a low-speed access medium 1 for low-speed data access, and a high-speed access medium 5 for high-speed data access. A label information search means 7 for searching for label information stored on the high-speed access medium 5; and a label information search switch 8 for indicating whether or not a file name for the file exists in the label information on the high-speed access medium 5. A label input unit 9 for inputting a label on the low-speed access medium 1; a label output unit 10 for outputting a label on the low-speed access medium 1; , A label address) as label information on the high-speed access medium 5.
It consists of eleven.

On the low-speed access medium 1, a plurality of files 4-A
To 4-Z and a label storage area 2 for storing labels 3-A to 3-Z for recording file names corresponding to the files 4-A to 4-Z, information on file attributes, information on file areas, and the like. Is provided.

A file name 6-A corresponding to each of the files 4-A to 4-Z on the low-speed access medium 1 is provided on the high-speed access medium 5.
6-Z and a label information storage area 6 for storing label information consisting of label addresses 6-A 'to 6-Z'.

Referring to FIG. 2, the processing in the label high-speed access method according to the present embodiment includes a label information search step 21, a file processing determination step 22, a label information search switch determination step 23, a label input step 24, a label information Search switch judgment step 25 and label output step
26, and a label information storage step 27.

Referring to FIG. 3, the processing in the label information search step 21 shown in FIG. 2 further includes a last label information setting step 31, a file name determination step 32, a label information search switch-on step 33, It comprises a processing determination step 34, a pointer decrement step 35, and a label information search switch-off step 36.

Referring to FIG. 4, the processing in the label information storage step 27 shown in FIG. 2 further includes a label information creation step 41 and a tail label information storage step.

Next, the operation of the thus configured high-speed label access method of the present embodiment will be described. Here,
File 4-Z from the program operating as job A
An example will be described in which the creation or retrieval of a label is requested at the time of creation of a file or opening of the file 4-Z.

Label 3 on low-speed access medium 1 from job A when file 4-Z is created or file 4-Z is opened
When a label search request for searching for -Z is issued, the label search request is input to the label information search means 7.

Upon receiving the label search request, the label information search means 7 sets the pointer X pointing to the label information position in the label information storage area 6 on the high-speed access medium 5 in the label information search step 21 to the last label information 6-Z, The initial value is set to the value indicating 6-Z '(step 31). Next, the label information 6-Z indicated by the pointer X, the file name 6-Z in the 6-Z' and the file 4- which is required to be created or opened 4- It is determined whether or not the file name of Z matches (step 32).

If the file names match in the judgment of step 32,
Label information 6-Z, 6- of the label 3-Z for which the search was requested
Since Z 'exists in the label information storage area 6 on the high-speed access medium 5, the label information search switch 8
Is turned on (step 33), and the processing in the label information search means 7 is terminated.

If the file names do not match in the determination in step 32, it is determined whether or not the next process should be performed by determining whether there is remaining label information (step 3).
Four). If the remaining label information exists, the pointer X
Is decremented by one (step 35), and step 32
Return to and repeat the following steps. If the remaining label information does not exist in the determination at step 34, the label information 6-Z, 6-Z 'of the label 3-Z for which the search is requested does not exist on the high-speed access medium 5, so that The label information search switch 8 is turned off (step 36), and the processing in the label information search means 7 ends.

By the processing in the label information searching means 7, the label information 6-A, 6-A 'to 6-Z, 6
-Z 'is searched from the tail side to the head side, whereby the label information 6-Z, 6-Z' corresponding to the label 3-Z on the low-speed access medium 1 is searched at high speed.

When the processing (step 21) in the label information search means 7 is completed, it is next determined whether the processing request for the file 4-Z from the job A is a creation request or an open request (step 22). In the case of an open request for Z, the search for the label 3-Z is performed, so the label information search switch 8 set by the label information search means 7 is checked (step 23).

If the label information search switch 8 is off in the determination in step 23, it means that there is no file 4-Z having the same file name 6-Z on the low-speed access medium 1, so an error is generated.

When the label information search switch 8 is turned on in the determination of step 23, the file 4-Z having the same file name 6-Z exists on the low-speed access medium 1, so that the label input means 9 uses the high-speed access medium. The label 3-Z on the low-speed access medium 1 is directly input using the label address 6-Z 'in the label information 6-Z and 6-Z' on step 5 (step 24). Thereby, information on the file 4-Z recorded in the label 3-Z can be obtained at high speed.

In addition, the file 4 from the job A
If the processing request for -Z is a creation request, the label information search switch 8 set by the label information search means 7 is checked (step 25).

If the label information search switch 8 is turned on in the determination of step 25, an error occurs because a file 4-Z having the same file name 6-Z already exists on the low-speed access medium 1.

Also, in the determination of step 25, the label information search switch 8
Is off, it means that there is no file 4-Z having the same file name 6-Z on the low-speed access medium 1, so that
With reference to the label address 6-Y 'in the last label information 6-Y, 6-Y' above, the last in the labels 3-A to 3-Y already existing on the low-speed access medium 1. 3-Z that manages the file 4-Z immediately after the label 3-Y of
Is output (step 26).

After the label output means 10 outputs the label 3-Z,
In the label information storage step 27, the label information storage unit 11
The label information composed of the file name 6-Z of the file 4-Z requested to be created and the label address 6-Z 'of the label 3-Z on the low-speed access medium 1 is created (step 41). Immediately after the last label information 6-Y, 6-Y 'in the label information 6-A, 6-A' to 6-Y, 6-Y 'already existing on the medium 5, the label information 6-Z, 6
-Z 'is stored (step 42).

〔The invention's effect〕

As described above, the present invention searches for label information on a high-speed access medium at high speed when creating a label on a low-speed access medium having a label storage area and when it is necessary to search for a label when accessing a file. By directly inputting and outputting labels to low-speed access media using the label address in the obtained label information, the processing time required for label search during file creation and file access can be significantly reduced. There are effects that can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart showing processing in the label high-speed access system of the present embodiment, and FIG. 3 is a flowchart of the label information search step shown in FIG. FIG. 4 is a flowchart showing more detailed processing of the label information storing step shown in FIG. In the figure, 1 ... low-speed access medium, 2 ... label storage area, 3-A to 3-Z ... label, 4-A to 4-Z ... file, 5 ... high-speed access medium, 6 ... label Information storage area, 6-A to 6-Z ... file name, 6-A 'to 6-Z' ... label address, 7 ... label information search means, 8 ... label information search switch, 9 ... label Input means, 10 ... label output means, 11 ... label information storage means.

Claims (1)

(57) [Claims] 1. A low-speed access medium for storing one or a plurality of files and storing a label including a file name and file area information corresponding to each file, a file name of the file on the low-speed access medium, and the low-speed access medium. A high-speed access medium storing fixed-length label information comprising a label address of a label on the access medium; and a correspondence stored on the high-speed access medium using a file name when searching for a label on the low-speed access medium. Label information retrieving means for retrieving label information to be read, and when the label information retrieving means retrieves the corresponding label information on the high-speed access medium, the label information in the label information is used to retrieve the label information on the low-speed access medium. A label input unit for directly inputting a label, and the label information search unit When the corresponding label information on the high-speed access medium is not searched, the label is directly output on the low-speed access medium by referring to the label address in the last label information stored on the high-speed access medium. Label output means; and label information storage means for storing label information of the label on the high-speed access medium when the label output means outputs a label on the low-speed access medium. File access device.