JPS63279346A - File replacement processing system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] This is an update processing method that improves operability for content preservation when updating files in a computer system.

Based on the user's update request, a copy of the specified original file and update history management information is created, and the correspondence between the original file and the copy is set in a correspondence table. All update processing for the original file is performed on the copy with reference to the correspondence table, and after the update processing is completed, the original file and update history management information are deleted and the original is replaced by the copy.

With this method, the user can update the file without being aware of the measures taken to preserve the file, and it is also possible to prevent conflicts between the update history management information and the file due to operational errors.

[Industrial application field]

The present invention relates to a file update processing method in a computer system.

When updating a file, in order to prevent the file contents from being destroyed due to a failure or the like and losing both the old and new file contents, create a temporary file that is a copy of the original file and update it on the temporary file. After completion, it is necessary to take measures such as converting the contents into an original file.

[Conventional technology]

In computers, etc. where programs are being developed by many users, files for each of the many source programs being developed are stored in a large-capacity storage device such as the computer's disk storage device, and these files are used for development purposes. Updated frequently as progress is made.

In such an environment, in order to preserve the file contents, for example, the files are duplicated and one is used as the current file, but when the file is updated, both files are updated so that the contents always match. There is a method in which services are provided by an operating system or the like, and when a failure occurs in the current file, the other file is switched to the current file.

However, although this method guarantees the latest content through duplication, it has the drawback that it is not possible to restore the state to the state at any update time in order to correct artificially erroneous updates.

As another method, there is a method in which change history management information is provided for a file and, for example, an editor that processes updates records the old content of the changed part and other information in the change history management information.

With this method, when an erroneous update is discovered, it is possible to return the file contents to the point before any update by tracing the change history management information. Therefore, we cannot guarantee that your files will be restored.

As a method to solve the problems of the above methods, file updates are not performed directly on the file to be updated (hereinafter referred to as the original file), but instead create a temporary file.
After making a copy of the original file in a temporary file and performing update processing on this temporary file, the contents of the temporary file are transferred to the original file.

In addition, the main parts of the update history management information (hereinafter referred to as management information) provided for each file include the update date and time, update position (for example, line number of the source program), and new and old content data of the updated part for each file update. It saves update history information consisting of etc., making it possible to recover from update errors, etc.

The update history information will be executed as part of the file update process, but in order to preserve the management information, the update history information will be stored in the management information (hereinafter referred to as temporary management information) provided corresponding to the temporary file. , and when transferring the file itself, the management information of the original file (
(hereinafter referred to as original document management information) and add it.

For this reason, when a user, such as a program developer, updates a file, he or she first creates a new file as a temporary file using the first command, and then makes a copy of the original file.

Next, by specifying a temporary file and inputting an update instruction command, the required update is performed on the temporary file, and at the same time, update history information regarding the update is recorded in the temporary management information.

When the update is completed, the user inputs a save command specifying the temporary file and the original file to transfer the contents of the temporary file to the original file.

Next, enter the command to merge management information to combine the update history information of the temporary management information and the original management information on the original management information, and add the update history information of the current update to the original management information. Then enter the delete command to delete the temporary file.

In this way, it is possible to unify both the file duplication and the update history management information described above, and to obtain an economical method that can eliminate the drawbacks of each.

[Problem that the invention seeks to solve]

As described above, it is possible to execute an update procedure that takes data preservation into consideration, but it is cumbersome for the user to process the temporary file while being aware of it, and if the user makes a mistake,
There is a problem in that only the file is updated and the management information is not updated, which may cause a conflict between the file and the management information.

[Means for solving problems]

FIG. 1 is a block diagram showing the configuration of a computer according to the present invention.

In the figure, 1 receives commands from the user,
A command reception unit 2 for passing to a required processing mechanism processes the file update request command to create a temporary file 8 and temporary management information 9 of a copy of the specified original file 6 and its management information 7, Correspondence table 5 shows the correspondence between both files.
3 is an update processing unit that processes the update instruction command and executes update processing on the temporary file 8 and temporary management information 9 determined by the correspondence table 5; 4 is the update end command This is a close processing unit that processes the original file 6 and replaces it with the temporary file 8.

[For production]

When the open processing section 2 receives an update request command from the command receiving section 1, it creates a copy of the original file 6 and its management information 7 specified in the command as a temporary file 8 and temporary management information 9.

Also, the correspondence between the original file 6 and the temporary file 8 is set in the correspondence table 5.

The update processing unit 3 receives the update instruction command. Since the command specifies the original file to be updated, the corresponding temporary file 8 is searched from the correspondence table 5 using the specified file name.

Update processing is performed on this temporary file 8 and temporary management information 9.

When the process according to the update instruction is completed, the user specifies the original file 6 and inputs a command to end the update.

The close processing unit 4 receives this update end command, searches the correspondence table 5 with the specified file name, determines the corresponding temporary file 8, and uses the temporary file 8 and temporary management information 9 to create the original file 6. and the management information 7 is replaced.

As a result of the above, the user only needs to update the original file, and it is also possible to prevent conflicts between file contents and management information due to operational errors.

〔Example〕

FIG. 2 shows the processing flow of the open processing section 2.

Upon receiving the update request command from the command reception unit 1, the open processing unit 2 performs so-called file open processing such as preparing a control table for accessing the original file 6 specified in the command in processing step 1o. I do.

Next, in a processing step 11, a new temporary file 8 is created and opened, and in a processing step 12, the contents of the original file 6 are copied to the temporary file 8. Further, in processing step 13, temporary management information 9 is created for the temporary file 8, and the contents of the original management information 7 are copied thereto.

In processing step 14, the file name of the original file and the file name of the temporary file are set in the correspondence table 5, the correspondence is displayed, and the process ends.

FIG. 3 shows an example of the processing flow of the update processing unit 3. When the update processing unit 3 receives an update instruction command, in processing step 20, a correspondence table is created based on the original file name to be updated specified in the command. 5, and if there is a file name, obtain the corresponding temporary file name, and proceed to processing step 2.
Go to 1.

Temporary file 8 determined by the temporary file name in processing step 21
access and perform the specified update. Temporary management information 9
Update history information according to the update content is added to the update information, and the process ends.

If, in processing step 20, there is no original file name in the correspondence table 5, in processing step 22, for example, a message indicating that the update will not be executed is output, and the processing ends.

FIG. 4 shows an example of the processing flow of the close processing section 4,
Upon receiving the update end command, the close processing unit 4
At processing step 30, the correspondence table 5 is searched using the file name specified in the command to determine the corresponding temporary file 8, and the process proceeds to processing step 31.

In a processing step 31, the original file 6 is first deleted, and in a processing step 32, the file name of the temporary file 8 is changed to the file name of the original file 6, thereby replacing it with the original file.

In processing step 33, a closing process is performed to delete the item in which the original file name is written from the correspondence table 5 and delete other related file control tables, and the process ends.

If there is no original file name in the correspondence table 5 at processing step 30, then, for example, an error message is output at processing step 34, and the processing ends.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in a computer that performs file update processing through temporary update processing for file preservation, it is possible to improve user operability and to prevent file contents caused by operational errors. Since the occurrence of contradictions in management information is eliminated, there is a significant industrial effect of improving the utilization efficiency and reliability of computers.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of the present invention, Fig. 2 is a flowchart of the processing of the oven processing section, Fig. 3 is a flowchart of the processing of the update processing section, and Fig. 4 is a flowchart of the processing of the close processing section. . In the figure, 1 is a command reception section, 2 is an oven processing section, 3 is an update processing section, 4 is a close processing section, 5 is a correspondence table,
6 is the original file, 7 is the original management information,
8 is a temporary file; 9 is temporary management information; 10 to 14; 20 to 22; 30 to 34 are processing steps; Processing flowchart Figure 3 Processing flowchart of the close processing section Figure 4

Claims (1)

[Claims] In a computer that holds files and management information for the files, based on a predetermined update request from a user of the computer, a temporary file consisting of a copy of the original file (6) specified in the request. (8) and a means for creating temporary management information (9) consisting of a copy of the management information (7) of the original file, and setting correspondence information (5) between the original file and the temporary file (
2), and according to the update instruction for the original file, search the corresponding information (5) to determine the temporary file, and update the temporary file (8) and the temporary management information (9) according to the update instruction. means (3) for executing processing; and means (4) for deleting the original file and the management information and replacing the original file and the management information with the temporary file and the temporary management information according to a predetermined update termination instruction; A file update processing method characterized by providing the following.