JP2920978B2 - Library update method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a library update method, and more particularly, to a library update method using two library files in a computer system.

[Conventional technology]

There are various methods for updating the members in the library file, but an updated member is created for the members in the library file, a new member is written in a free area in the library file, and the old member area is reused. That is common.

However, depending on the library format, the updated member area may not be used effectively when updated. At the time of updating, as one method for preventing free areas from being scattered by members before updating in the library file, two library files are prepared, the member to be updated is the member after updating, and the member not to be updated is Move the members as they are from the current library file (hereinafter referred to as the updated library file) to the other library file (hereinafter referred to as the updated library file) so that there is no space between the members, and then transfer the entire library to the updated library file There is a method of writing back to the updated library file from.

[Problems to be solved by the invention]

In the above-described conventional library updating method, after updating using two library files, the entire library is written back from the updated library file to the updated library file. There is a disadvantage that if the process is terminated when writing back to the library, the library body may be broken.

In view of the above, an object of the present invention is to provide a library updating method using two library files, in which there is no possibility that the library body will be damaged even if the processing is terminated.

[Means for solving the problem]

A library updating method according to the present invention is a library updating method for performing a member updating process of a library file based on a member updating request from a librarian in a computer system in which a library file is duplicated as an updated library file and an updated library file. In the above, when a librarian requests a member update of a library file, a member to be updated from the updated library file is an updated member, a member not to be updated is a member as it is, and a space is generated between members in the updated library file. Updating means for updating while performing the migration so as not to perform the update, and based on whether or not the file name for change is a unique value after the member migration from the updated library file to the updated library file is completed by the updating means. Brian determines whether the file name for change is in use, and if so, waits until the use of the file name for change by another librarian is completed. When it is determined that the file name for change is not used, the file name of the library file to be updated and the file name for change are exchanged, the file name for change and the file name of the update library file are exchanged, File name changing means for replacing the updated library file with the updated library file by exchanging the file name of the updated library file and the file name for change.

[Action]

In the library updating method according to the present invention, when the updating means receives a library file member update request from the librarian, the member to be updated from the updated library file is the updated member, and the non-updated member is the unchanged member. The file is updated while transferring so that there is no space between the members, and the file name control unit determines whether or not the change file name is a unique value after the update unit completes the transfer of the member from the updated library file to the updated library file. It is determined whether or not another librarian uses the file name for change based on the file name.If the file name is being used, wait until the use of the file name for change by another librarian is completed. File name for change is not used by name control means When it is determined, the file name of the library file to be updated is exchanged with the file name for modification, the file name for modification is exchanged with the file name of the library file to be updated, and the file name of the library file to be updated and the file name for modification are exchanged. To replace the updated library file with the updated library file.

〔Example〕

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

FIG. 1 is a block diagram showing a configuration of a library updating method according to one embodiment of the present invention. The main part of the library updating method according to the present embodiment includes a librarian 1, an updated library file 2, and an updated library file 3.

The librarian 1 includes an updating unit 11 and a file name exchange processing unit 12 including a file name changing unit 13 and a file name control unit 14.

Referring to FIG. 2, the processing of the file name changing means 13 in the file name exchange processing unit 12 includes an updated library file name change processing step 44, an updated library file name change processing step 45, and an updated library file name change. It consists of processing step 46. The processing of the file name control means 14 in the file name exchange processing unit 12 includes a file name use collation processing step 41, a file name use determination step 42, and a file name occupancy use step 43
And a file name exclusive use release processing step 47.

Next, the operation of the library updating method of the present embodiment configured as described above will be described. Here, for example, the file name of the updated library file 2 is “A”, the file name of the updated library file 3 is “B”, and the file name for change is “W”.

At this time, the file name "A" is the name specified at the time of the library file member update request from the librarian 1, and the file name "B" is the update library corresponding to the updated library file 2 having the specified file name "A". The name of the file 3 and the file name for change “W” are names (unique values) given to the computer system in advance as generally unused file names.

When the librarian 1 is activated, the updating means 11 updates the contents of the updated library file 2 and outputs the update result to the updated library file 3. That is, the member to be updated moves the updated member, and the member who does not update moves the same member from the updated library file 2 to the updated library file 3 so that there is no space between the members.

When the update by the updating unit 11 is completed, the file name exchange processing unit 12 is started, and first, the file name control unit 14
Based on whether the change file name is the unique value “W”, it is determined whether or not the change file name “W” has already been used by another librarian (not shown) (step 41). (Step 42). If the change file name "W" has already been used, the file name control means 14 waits until it is no longer used, and if not, another librarian (not shown).
The use of the change file name "W" is suppressed (step 43).

Next, the file name changing means 13 exchanges the file name "A" of the library file 2 to be updated with "W" stored in the file name for change (step 44). Subsequently, the file name changing means 13 exchanges the file name "B" of the updated library file 3 with "A" stored in the file name for change (step 45). Next, file name changing means
13 exchanges "W" as the file name of the library file 2 to be updated with "B" stored in the file name for change (step 46). As described above, the updated library file 2 and the updated library file 3 are replaced.

Finally, the file name control means 14 permits the use of the changing file name “W” by another librarian (step
47).

〔The invention's effect〕

As described above, according to the present invention, in a library updating method using two library files in a computer system, by exchanging library file names after updating a library file, there is no need to write back to the original library file. There is an effect that the library body is not broken even if is interrupted on the way.

Further, since writing back to the library file is not performed, the input / output time for the library file is halved, so that there is an effect that the update time of the library can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a library update method according to an embodiment of the present invention, and FIG. 2 is a flowchart showing a process in a file name exchange processing unit in FIG. In the figure, 1 ... librarian, 2 ... updated library file, 3 ... updated library file, 11 ... update means, 12 ... file name exchange processing unit, 13 ... file name change means, 14 ... File name control means.

Claims (1)

(57) [Claims] In a computer system in which a library file is duplicated as an updated library file and an updated library file, a library updating method for performing a member updating process of a library file based on a member updating request from a librarian. The member updating from the updated library file when the library file member update request is received from the client is the updated member, the member not updating is the same member, and there is no space between the members in the updated library file. Updating means for performing an update while moving to the other library, after completion of the member transfer from the updated library file to the updated library file by the updating means, based on whether or not the file name for change is a unique value, File name control means for judging whether or not the new file name is in use, and when in use, waiting until the use of the new file name by another librarian is completed; When it is determined that the updated library file name is not used, the file name of the updated library file and the file name of the update library file are exchanged, and the file name of the update file and the file name of the updated library file are exchanged. A library updating method, comprising: a file name changing unit that replaces the updated library file with the updated library file by exchanging a file name of the file and a file name for change.