JPH0481945A - Duplex operation control system for file - Google Patents

Abstract

PURPOSE:To easily restart the updating processing after its fault even in the case the fault of device is occurred again by copying and regenerating a file to be duplex-operated, when the device fault of device is occurred, and using this copy file as an alternate file of the file in which a fault is occurred. CONSTITUTION:In the case it is discriminated that the fault of device occurred, an updating processing temporary stop means 5 instructs a temporary stop of an updating processing of an updating processing means 2, and the updating processing means 2 holds temporarily an updating request from an updating processing request program 20, and stops temporarily the updating processing. After the updating processing is stopped temporarily, a file copy program 13 is actuated, and the updating processing is restarted with an output of a journal. Subsequently, when the file copy program 13 is finished, a copy file is used as an alternate file of the file in which the fault occurred and a dual updating processing is restarted. In such a way, no matter how many times the device fault occurred, in the program which is executing the updating processing, the updating processing can easily be restarted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a file duplication control method, and the present invention relates to a file duplication control method. The present invention also relates to a file duplication control method that guarantees the original file data.

[Conventional technology]

In the conventional file duplication control method, if a file is destroyed due to a device failure during update processing in a program that performs file update processing, the one file in which the device failure occurred is cut off, and the file is restored on the normal device. Either update the other file only after the failure occurs, or
Alternatively, when a device failure occurs, in order to copy and create a new file to be duplicated again in place of the one file in which the device failure occurred, the update process is temporarily stopped and the file copy process is performed.

[Problem to be solved by the invention]

In the conventional file duplication control method described above, if one of the files is destroyed due to a device failure during the update process in a program that updates a file, the file with the device failure is cut off and the file is restored to the normal device. The former method, in which update processing is performed only on files after a failure has occurred, has the disadvantage that if a device failure occurs again, the update processing after the failure cannot be restarted.

In addition, in the latter case, when a device failure occurs, the update process is paused and the file copy process is performed, so that when a device failure occurs, the update request requested at that time is It has the disadvantage that it takes a very long time to complete.

[Means to solve the problem]

The file duplication control method of the present invention is a file duplication control method for a file processing device that duplicates a file and outputs the same content to two files on different devices when updating a file. , update processing means that receives a file update request from an update processing request program and updates two files on different devices with the same content; and an update processing temporary that temporarily suspends updating of the two files of the update processing means. When one of the two files being updated becomes unusable due to a device failure and the update process is temporarily stopped by the update process suspending unit, the device failure occurs. faulty file release means for releasing the faulty file, which is the above file; and after the faulty file is released by the faulty file release means, storing a journal record that is an update image record when performing subsequent update processing. A journal file creation means that creates a journal file that is a file, and after creating a journal file by the journal file creation means, a copy file is created on another device that has not been used until now, and the copy file is created on a separate device that has not been used until now. file copying program starting means for starting a file copying program for copying contents into a copy file from among the files in which a device failure has not occurred; and the updating, which has been temporarily stopped by the updating processing temporary stopping means. update processing restart means for restarting the update processing by the processing means and causing the update processing means to perform the update processing if the update request from the update processing request program has not yet been completed when the update processing is temporarily stopped; a journal storage means for storing a journal record in a journal file created by the journal file creation means when the update processing by the update processing means is restarted by the processing restart means and the file is updated; Copy file creation means in the file copy program that creates a copy file after the file copy program is started by the copy program start means; and a device failure after the copy file creation means creates the copy file. a file copying means in the file copying program that copies the contents from the file in which no error has occurred to a copy file; and after all the files have been copied by the file copying means, the journal storage means a copy file update means in the file copying program that updates a copy file with journal records stored in the file; and when the copy file update means almost eliminates unused journal records stored in the journal file. , terminating the file copying program, notifying the update processing suspension means that the update processing of the copied file has been completed, and causing the update processing suspension means to temporarily suspend the file update processing of the update processing means; A copy file update end notification means in a file copying program, and the copy file update end notification means transfer the copy file to an unused journal file remaining in the journal file after the update process is temporarily stopped by the update process suspension means. Duplicated file exchange means for updating the journal record with a journal record, releasing the journal file by using the copy file as a substitute file for the failed file, and causing the update processing restart means to restart the file update processing by the update processing means; It is configured.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the file duplication control method of the present invention.

As shown in FIG. 1, in this embodiment, a file processing device 1
, update processing means 2, file 3, file 4,
Update processing temporary stop means 5, failed file release means 6, journal file creation means 7, journal file 8 for storing journal records 18, file copy program starting means 9, update processing restart means 10,
Journal storage means 11 and duplex file exchange means 1
2, a file copy program 13 (including a copy file creation means 14, a file copy means 18, a copy file update means 17, and a copy file update end notification means 18), a copy file 15, and an update processing request program. It consists of 20.

FIG. 2 is a flowchart showing an example of the operation in this embodiment, from when a device failure occurs and the update process is temporarily stopped, to when the file copy program 13 is started and the update process is restarted with journal output. It is.

The update processing means 2 receives the update processing request program 20 from the update processing request program 20.
A file update request is received, and update processing is performed on both files 3 and 4 on the file processing device 1.

Therefore, in step 201 in Figure 2, both files 3
．． As long as there is no failure in the device where 4 exists (NO)
In step 203, the update processing means 2 continues the update processing for both files 3 and 4. for example,
If it is determined in step 201 that a failure has occurred in the device in which file 3 exists (YES), the update processing suspension means 5 temporarily suspends the update processing of the update processing means 2 in step 202. and the update processing means 2
The update request from the update process request program 20 is temporarily suspended, and the update process is temporarily stopped.

Next, in step 204, the faulty file release means 6 releases the file 3 in which the fault has occurred. Failure file 3
After releasing the failed file 3, in step 205, the journal file creation means 7 creates a journal file 8 for storing the journal record 19 for the file 4 after the failed file 3 is released.

Next, in step 206, the file copying program starting means 9 starts the file copying program 13, which operates asynchronously with the update processing means 2, in order to create the same file as the file 4.

After the file copying program 13 is started, the update processing resuming means 10 performs the following steps in order to be able to accept update requests from the update processing request program 20 again.
The update processing of the update processing means 2 is restarted.

At this time, in step 207, the update processing restart means 10:
In step 202, it is determined whether the update request for the file 4 at which the update processing suspension means 5 temporarily stopped the update processing has already been completed. If it is determined in step 207 that the update process has not finished yet (No)
In step 208, the update processing means 2 performs the update processing on the file 4 when it is temporarily stopped. At this time, in step 209, the journal storage means 11 stores the updated image in the journal file 8.

In step 207, the update processing restart means 10 updates the file 4.
If it is determined that the update request for has already ended (
If YES), the update processing means 2 is instructed to restart the update processing, and in step 210, the update processing means 2 accepts a new update request from the update processing request program 20, and restarts the update processing for the file 4. .

FIG. 3 is a flowchart showing an example of the operation of the file copy program 13 of this embodiment.

First, in step 301 of FIG. 3, the file copy program 13 creates a copy file 15 using the copy file creation means 14 in order to create the same file as the file 4. Next, in step 302, the file copying means 16 starts copying from the file 4 to the copy file 15.

Then, in step 303, if the file copying means 16 determines that the file copying has been completed (YES), in step 304, the copying file updating means 17 extracts the journal record 19 from the journal file 8, and Update. Also, step 30
If it is determined in step 5 that there are no more journal records 19 remaining in the journal file 8 (YES), in step 30B, the copy file update end notification means 1
8 notifies the update processing temporary stop means 5 that the file copy program 13 has ended.

FIG. 4 shows the operation in this embodiment from when update processing is restarted with journal output until the file copy program 13 is terminated and redundant update processing is restarted using the copied file as a substitute for the failed file. It is a flowchart which shows an example.

When the update processing means 2 is instructed to restart the update processing for the file 4 from the update processing restart means 10 at step 210 in FIG. The update request is accepted and update processing is performed on the file 4. During update processing, the journal record 19 is stored in the journal file 8 using the journal storage means 11 in step 403 for each update.

At this time, the update processing temporary stop means 5 waits in step 402 to receive a notification of completion of the file copying program 3 from the copy file update completion notification means 18, and upon receiving the completion notification (YES), in step 404. , the file update process of the update processing means 2 is temporarily stopped.

Next, in step 405, the duplex file exchange means 12
updates the copy file 15 with the journal record 19 remaining in the journal file 8, and in step 40θ
Then, copy file 15 is copied to file 3, which is the faulty file.
Use a duplicate file instead. Then, the journal file 8 that is no longer needed is released.

Next, in step 407, the update processing resuming means 10 determines whether the update request for the file 4 at the time when the update processing suspension means 5 suspended the update processing in step 404 has already been completed. However, if it is determined in step 407 that the update process has not finished yet (NO),
In step 408, the update processing performed when the update processing means 2 is temporarily stopped is performed on the file 4 and the copy file 6.

If the update processing resuming means 10 determines in step 407 that the update request for file 4 has already been completed (YES), it instructs the update processing means 2 to restart the update processing, and in step 409 , the update processing means 2 receives a new update request from the update processing request program 20 and restarts the update processing for the file 4 and the copy file 15.

〔Effect of the invention〕

As explained above, the file duplication control method of the present invention allows the update process to be easily restarted no matter how many times a device failure occurs in the program performing the update process. , even when copying and recreating a file to be duplicated, the update request requested at that time is
It has the effect of being able to process without waiting for a long time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the file duplication control method of the present invention, and FIG. 2 is a block diagram showing an embodiment of the file duplication control method according to the present invention. 3 is a flowchart showing an example of the operation of the file copy program 13 of this embodiment, and FIG. 4 is a flowchart showing an example of the operation of the file copy program 13 of this embodiment. 1 is a flowchart showing an example of the operation from restarting update processing with journal output to terminating the file copying program 13 and restarting duplex update processing using the copied file as a substitute for the failed file in the embodiment. be. 1... File processing device, 2... Update processing means, 3
．． 4... File, 5... Update processing temporary stop means,
6... Means for releasing faulty file, 7... Means for creating journal file, 8... Journal file, 8...
・File copy program starting means, 10... Update processing restart means, 11... Journal storage means, 12...
- Duplicated file exchange means, 13... File copy program, 14... Copy file creation means, 15-.
・Copy file, 16...File copying means, 17.
. . . Copy file updating means, 18 . . . Copy file update completion notification means, 19 . . Journal record, . . . Update processing request program.

Claims (1)

[Claims] In a file duplication control method in a file processing device that duplicates the file and outputs the same content to two files on different devices when performing update processing on a file, an update processing request is provided. an update processing means that receives a file update request from a program and updates two files on different devices with the same content; an update processing pause means that temporarily suspends updating of the two files of the update processing means; When one of the two files being updated becomes unusable due to a device failure, the file on the device where the device failure occurred after the update process is suspended by the update process suspension means. a faulty file release means for releasing a certain faulty file; and a journal, which is a file that stores journal records that are update image records when performing subsequent update processing after the faulty file is released by the faulty file release means. A journal file creation means that creates a file, and after creating a journal file by the journal file creation means, a copy file is created on another device that has not been used until now, and a copy file is created on a separate device that has not been used until now. a file copying program starting means for starting a file copying program that copies contents to a copy file from a file in which a device failure has not occurred; and an update by the update processing means that has been temporarily stopped by the update processing suspension means. update processing restart means for causing the update processing means to perform the update processing if the update request from the update processing request program has not yet been completed when the processing is restarted and paused; , a journal storage means for storing a journal record in a journal file created by the journal file creation means when the update processing by the update processing means is restarted and a file is updated; and the file copy program activation means a copy file creation means in the file copy program that creates a copy file after the file copy program is started, and a device failure that does not occur after the copy file is created by the copy file creation means. a file copying means in said file copying program that copies contents from one file to a copy file; and after all files are copied by said file copying means, said journal storage means stores the contents in a journal file. a copy file update means in the file copy program that updates a copy file with a journal record stored in the file copy program; The file copying program terminates the program, notifies the update processing suspension means that the copy file update processing has ended, and causes the update processing suspension means to temporarily suspend the file update processing of the update processing means. a copy file update end notification means, the copy file update end notification means updates the copy file with unused journal records remaining in the journal file after the update processing is temporarily suspended by the update processing suspension means. and a duplicated file exchange means for releasing the journal file by using the copy file as a substitute file for the failed file, and causing the update processing restart means to restart the file update processing by the update processing means. Duplex control method.