JPH08328928A - Backup controller - Google Patents

Abstract

PURPOSE: To provide a backup controller capable of processing save and restore in parallel by managing the save/restore requests of the processing object files of plural application processing means. CONSTITUTION: This controller is provided with a backup processing execution control means 13 for receiving save/restore requests or file state information inquire requests from application processing means 101-10n. The backup processing execution control means 13 is provided with a backup control means 14 for moving the saved/restored file between an external storage device 2 and a backup storage device 3 and a queue/list control means 15 for managing the save/restore requests.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backup control device for performing a save process of a backup file used for recovering a file failure of an electronic computer system and a restore process for restoring the backup file,
In particular, the present invention relates to a backup control device that processes save / restore requests issued from a plurality of application processing means in parallel.

[0002]

2. Description of the Related Art In the prior art, a file save process or a file restore process is executed by an application processing program. Therefore, when the backup storage device is being used by the save process or restore process, another application processing program is stored in the device. The save request or restore request could not be made from.

If the file to be saved is being used by another application processing program at the time of executing the save process, the execution of the save process is waited until the use of the target file is completed, or the file is excluded from the save targets. Or, the system of whether to abort the save process was adopted. In these methods, since the save target file is used up, it is necessary to interrupt the process and wait even if other save target files are not being used. There was a problem that I could not understand.

Further, in the case of backup processing, after confirming the method of forcibly reading out the access mode of the file and switching to exclusive use and the presence or absence of the application processing program being executed, all other application processing programs are terminated. There is a method to start the save process with. With these methods, the update information of the application processing program that previously used the file is not reflected in the file, and even if it is saved during processing or the target file is not used by another application processing program. , There was a problem that save was kept waiting until all application processing programs were completed.

[0005]

The conventional backup processing methods have the following problems.

(1) A plurality of application processing programs cannot make parallel save requests to the same backup storage device. For file preservation, it is desirable to save when the file update process is completed. When a plurality of application processing programs are performing parallel processing, there is a possibility that the backup devices may be in conflict with each other, so a save request cannot be issued.

(2) Even when a file is restored, if the file is saved by another application processing program, the restoration cannot be performed until the series of file save processing is completed. Therefore, the restore process of returning the file to the save point is kept waiting.

(3) If the save target file is being used by the application processing program, the save may not be performed correctly. In addition, the entire save process may be delayed until the use of all files is completed, which may delay the end of the save process.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide a backup control device for executing a file save operation or a file restore operation based on a save or restore request of an application processing means as a function of an operating system.

Therefore, a backup process which processes a save request for saving a file, a restore request for restoring a file, or a status information inquiry request for inquiring a save / restore status of a file issued by a plurality of application processing means operating in parallel according to the present invention. In the control device, the save request is analyzed, the save request and the status information of the save request target file are created, and the queue /
The list management means analyzes the send request and the restore request to create status information of the restore request and the file requested for the restore request, and sends to the queue / list management means and analyzes the file status information inquiry request to analyze the save management queue and Backup processing execution control means for creating status information of the file by referring to the restore management queue and save file list and sending it to the requesting application processing means, and save request and status for the save management queue Queue / list management means for processing registration or deletion of information and registration or deletion of a restore request and status information for the restore management queue in response to the call, and a save request file of the save management queue for an external storage device Read from, transport, backup storage Saving, or the transferring reads the restored file restore management queue from backup storage device, characterized by having a a backup control unit configured to restore the external storage device.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

Referring to FIG. 1, which shows the configuration of an embodiment of the present invention, a backup control device 1 includes an application processing means 1 on which an application processing program operates.
01, application processing means 102, application processing means 103, application processing means 10n
An external storage device 2 for storing the files 21 to 2n to be processed, a backup storage device 3 for storing the saved files 21 to 2n, a save request or a restore request of the application processing means 101 to 10n, or the state of the file. A backup processing execution control means 13 that receives an information inquiry request, analyzes the request, and saves, restores, or inquires, and save request and save target file status information in the save management queue 40. Queue / list management means 15 for registering or deleting the status information of the target file in the restore management queue 41, and backup control means 14 for transferring the save file and the restore file to the external storage device 2 and the backup storage device 3, respectively. Have That. File 2 in external storage device 2
1 to 2n are stored. Backup storage device 3
In the file, file save data 31 to 3n of the file saved from the files 21 to 2n are stored.

In this embodiment, the application processing means 101 for making a save request to the files 21 to 2n.
And application processing means 102, application processing means 103 for making a restore request to the file save data 31 to 3n, and files 21 to 2
application processing means 10n for inquiring the save / restore execution status and the file status information of the save result, the save management queue 40 for managing the save request, and the restore management queue 4 for managing the restore request.
1 and the file save data 31 of the backup device 3
A save file list 42 for managing the files 3 to 3n is included.

Further, a backup processing execution control means 13 for controlling the operation of the backup control device 1, a backup control means 14 for controlling file transfer of save processing and restore processing, a save management queue 40, a restore management queue 41 and a save. File list 4
And a queue / list management unit 15 that manages 2.
Further, referring to FIG. 4 exemplifying the file status information 90, the save requests 401 and 4 of the save management queue 40 are shown.
02, a restore request 411 of the restore management queue 41,
The save file names 421 to 42n in the save file list 42 are pointers 91 indicating the next and previous cue / list positions, and information 9 for specifying the external storage device 2.
2, information 93 for specifying a file, information 94 for specifying the backup storage device 3, request generation time and save / restore execution time information 95, information 96 for specifying the file data position of the backup storage device 3. , Information 97 indicating save / restore execution information, and information 98 indicating a save result.

When the application processing means 101 of FIG. 1 requests the backup processing execution control means 13 to save the file 25, the application processing means 1
01 is a save request backup processing execution control means 13
To send. The backup processing execution control means 13 activates the queue / list management means 15, and the save management queue 4
The save request 401 and the file status information 90 of the target file are registered in 0. Backup process execution control means 1
3 activates the backup control means 14, and if the save target file 25 in the backup storage device 3 and the external storage device 2 is accessible, the file 25
Is saved in the position 3n next to the last saved file save data 3m in the backup storage device 3, and the queue / list management means 15 deletes the save request 401 corresponding to the file 25 from the save management queue 40. When the backup storage device 3 or the file 25 is being used by another application processing means 102, the backup processing execution control means 13 sets a timer so that the backup control means 14 is restarted after a certain period of time, and the save request acceptance ends. To do.

Even when a restore request for the file 24 is sent from the application processing means 103 to the backup processing execution control means 13, it is the same as the save request until the restore request 411 and the target file status information 90 are registered in the restore management queue 41. However, the processing after starting the backup control means 14 is different. In the case of a restore request, first, it is confirmed whether the save file information 42n of the restore request 411 is registered in the save file list 42. If it is registered, the status information 90 indicates whether the save or restore to the backup storage device 3 is being executed and whether the file 24 to be restored is used by another application processing unit.
If it is not being executed and is not being used, the read position of the backup storage device 3 is acquired from the status information 90, and the file save data 3m of the restore request 411 is acquired.
Then, the restore processing from the file save data 3m to the file 24 is executed. After that, the restore request 411 is deleted from the restore management queue 41.

When a status inquiry request is issued from the application processing means 10n, the backup processing execution means 1
3 receives the request and activates the queue / list management means 15, and each status information 90 of the save requests 401 to 402 in the save management queue 40 and each status information 905 of the restore request 411 in the restore management queue 41. And save file names 421 to 42 in the save file list 42
The waiting state and save execution result of each request can be acquired based on each of the state information 90 of n.

The operation of this embodiment will be described below with reference to the flow chart.

Flowchart showing the operation of the backup processing execution means 13 and the queue / list management means 15 Referring to FIG. 2, the backup processing execution means 13 performs steps 100 to 300 after receiving requests from the application processing means 101 to 10n. Confirm the request contents with, and if it is a save request (YES in step 100),
The queue / list management means 15 is activated and a save request is registered in the save management queue 40 (step 400). If the request is a restore request (YE in step 200)
S), the queue / list management means 15 is activated and a restore request is registered in the restore management queue 41 (step 5).
00). If the request is a status information inquiry (step 300)
YES), the queue / list management means 15 is activated to notify the request source of the status information 90 of the save management queue 40, the restore management queue 41, and the save file list 42 (step 600). If the request is neither of the above (NO in step 300), an error is notified (step 800). After the save and restore requests are queued, the backup control means 14 is activated,
Save or restore is performed (step 700).

Flowchart showing the operation of the backup control means 14 Referring to FIG. 3, when the backup control means 14 is called from the backup process execution control means 13 and receives a save / restore request, the backup storage device 3 of interest. Whether the save / restore processing is being performed in step S701 is confirmed by the information 97 indicating the save / restore execution state of the state information 90 (step 701). If the save / restore processing is not performed (step 701).
No), the queue / list management means 15 confirms whether or not there is a restore request in the restore management queue 41 (step 704). When the list request 41n is the restore management queue 41 (YES in step 702), the queue / list managing means 15 causes the restore management queue 41 and save file information 421 of the save file list 42.
Through 42n, the pointer 91 of the status information 90 is traced (step 710). When the pointer file is not in the save file list 42 (NO in step 711), the pointer list request is deleted (step 712), and the next pointer is set. Trace to the end (NO in steps 714, 715,
711). It is confirmed whether the target file 2n in the external storage device 2 has been saved. If the target file 2n is in the save list 42 (YES in step 711) and is being used by another application processing unit (YES in step 713), the process moves to confirmation of the next file (step 714). As described above, it is possible to sequentially restore target files that are requested to be restored and are not used by other application processing means. When the file 2n to be restored is in the save file list 42 and is not used by another application processing means (NO in step 713), the right to use the target file 2n in the external storage device 2 is secured (step 720). ), The read position of the backup storage device 3 is positioned at the position of the target file save data 3n with reference to the status information 90 (step 721), and the file 2n of the external storage device 2 is restored (step 722), Storage device 2
Release the right to use the file 2n (step 72)
3). Then, the file 2n restored from the restore management queue 41 by the queue / list management means 15
Release request 41n is canceled (step 72).
4).

When there is no restore request in the restore management queue 41 (NO in step 702) and when it is determined that the file to be restored does not exist in the restore management queue 41 (YES in step 715), the queue / list managing means 15 determines. It is confirmed whether there is a save request in the save management queue 40 (step 703). When there is a save request 401 (YES in step 703), the queue / list management means 15 follows the pointer 91 of the status information 90 (step 730), and when the file of the pointer is in use by another application processing means (step). (YES in 731), the pointer is positioned at the next queue position, the pointer is sequentially traced to the end (steps 732 and 733), and the file is the save request target file in the save management queue 40, and is used by another application processing unit. Search for items that have not been processed (N in step 731)
O). It is possible to sequentially save files that have been requested to be saved but are not used by other application processing means.

If there is no file being used by another application processing means (NO in step 731), the right to use the target file 2n in the external storage device 2 is secured (step 40), and the status information 90 of the file is set. Based on this, the write position of the backup storage device 3 is positioned at the end of the file save data 3n (step 741), the file 2n of the external storage device 2 is saved (step 742), and the file 2n of the external storage device 2 is used. The right is released (step 743). After that, the queue / list managing means 15 releases the save request 401 of the file saved from the save management queue 40 and registers it in the save file list 42 (step 744).

When the restore request 411 is deleted from the restore management queue 41 and the restore processing is completed (step 724), the save request is deleted from the save management queue 40 and registered in the save file list 42 to complete the save processing. If (step 744), the process returns to the process for another request (step 701). Since the save / restore request can be confirmed when the save or restore of one file is completed, the time required for the restore request can be kept to a minimum.

If the backup storage device 3 is executing a save / restore process (YES in step 701), there is no restore request (NO in step 702), and there is no save request (NO in step 703), and a save request. If there is no such request (YES in step 733), the queue / list management means 15 confirms whether there is a save request or a restore request (step 704). If there is any request (NO in step 704), a timer start request is made, and the backup control means 14 is set to start again after a fixed time (step 70).
5). If there is no save and restore request (YES in step 704) and the timer start request ends the processing (step 705), the backup processing execution control means 1
Complete 3.

[0025]

As described above, according to the backup control device of the present invention, a plurality of application processing means can make save requests in parallel to the same backup device.

Further, according to the present invention, when it is necessary to restore a file, a restore request can be issued even when the save is being performed by another application processing means, and the object of saving can be obtained when the save of one file is completed. Files can be restored with priority.

Further, according to the present invention, even when the file to be saved is in use, another save request file is preferentially saved, and the entire save process is not kept waiting.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment of FIG.

3 is a flowchart showing the operation of the backup control means of the embodiment of FIG.

FIG. 4 is a diagram showing an example of file status information.

[Explanation of symbols]

 1 Backup Control Device 2 External Storage Device 3 Backup Storage Device 101 to 10n Application Processing Means 13 Backup Processing Execution Control Means 14 Backup Control Means 15 Queue / List Management Means 21 to 2n Files 31 to 3n File Save Data 40 Save Management Queues 41 Restore Management queue 42 Save file list 401, 402 Save request 411 Restore request 421-42n Save file name

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuharu Sato, 5-1, Minami-Ichijo Nishi 4-chome, Chuo-ku, Sapporo-shi, Hokkaido 1-Hokkaido NEC Software Co., Ltd. In-house

Claims (2)

[Claims] 1. A backup control device for processing a save request for saving a file, a restore request for restoring a file, or a status information inquiry request for inquiring a save / restore status of a file issued by a plurality of application processing means operating in parallel. Then, the save request is analyzed, state information of the save request and the file of the save request target is created, and the state information of the restore request and the file of the restore request target is analyzed by sending to the queue / list management means and the restore request. Is created and sent to the queue / list management means, the file status information inquiry request is analyzed, the status information of the file is created by referring to the save management queue, the restore management queue, and the save file list, and the request source Send to application processing means and process Backup processing execution control means for registering or deleting a save request and status information in the save management queue and registering or deleting a restore request and status information in the restore management queue in response to the call. Queue / list management means, and a save request file of the save management queue is read from an external storage device and transferred, and saved in a backup storage device, or a restore target file of the restore management queue is read from the backup storage device and transferred. And a backup control unit that restores to an external storage device. 2. The status information includes pointers indicating the next and previous queue / list positions indicating the connection between the queue / list management means for registering a save request or a restore request in the queue, and a save request or a restore request. Request generation time and save / restore execution time, information that identifies the target file of the save request and restore request, information that identifies the external storage device that stores the file, and information that identifies the backup storage device The information for specifying the position of the save file in the backup storage device, the information indicating the save / restore execution state of the file, and the information indicating the save result of the file. Backup controller.