JP2868357B2 - File recovery method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file recovery system which uses a plurality of backup media to reduce the time required for file recovery processing.

[0002]

2. Description of the Related Art In a conventional file recovery method, a single backup medium is allocated at the same time, and a backup record is sequentially input to each backup medium to perform recovery.

[0003]

In the above-described conventional file recovery method, a single backup medium is allocated at the same time, and a backup record is sequentially input to each backup medium to perform a recovery process.
There was a problem that the time required to search for a backup record of a file to be recovered was long.

[0004]

In order to solve the above-mentioned problems, a file recovery method provided by the present invention is a method in which a file recovery process simultaneously allocates backup media of a plurality of volumes and a file recovery process. One backup record from multiple backup media
A means to control the input of each record, and the file recovery process does not wait for the completion of the input of the backup record from another backup medium to the backup record from the backup medium in the buffer corresponding to each of the plurality of allocated backup media. Means for inputting, means for judging whether the backup record input from the backup medium by the file recovery process is a backup record of the file to be recovered based on the file information in the backup record, Means for outputting to a predetermined position of the recovery target file based on the

[0005]

When the backup medium has a plurality of volumes, the backup records are input one by one without waiting for the completion of the input of the backup records from the other backup medium from the plurality of backup media allocated at the same time. Perform backup processing while processing backup media in parallel.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a file recovery method according to one embodiment of the present invention.

In the figure, 1A and 1B are backup media,
2 is a file recovery process, 9A and 9B are files to be recovered, 4 is a backup medium control means for controlling the allocated backup media 1A and 1B, 6A
And 6B are assigned backup media 1
A, a backup record input buffer for inputting backup records corresponding to 1B, 5 is a backup record input buffer control means for checking the availability of backup record input buffers 6A, 6B, 3 is a backup medium control means 4 and a backup record input means. Backup record input means comprising buffer control means 5 and backup record input buffers 6A and 6B;
7 is a backup record for the recovery target file 9
Recovery target file backup record determining means for determining whether the backup records are A and 9B backup records, and reference numeral 8 denotes a recovery record output means for recovering files 9A and 9B.

Next, the operation of the present invention will be described. First, when the control is passed to the file recovery process 2, the backup record input means 3 causes the backup medium control means 4 to transmit the plurality of assigned backup media 1
A, 1B, the backup record input buffer control means 5 is provided for the backup record input buffers 6A, 6A provided for the respective backup media 1A, 1B.
The backup record is input to the backup record input buffers 6A and 6B while checking the empty state of B.
When there is no longer any recovery record in each of the backup media 1A and 1B and there is no backup media to be allocated, the file recovery process 2 ends.

The recovery target file backup record determination means 7 includes a backup record input buffer 6
The backup records input to the files A and 6B are determined based on the file information of the input backup records of the files 9A and 9B to be recovered. The control is transferred to the file backup record output means 8.

The recovery target file backup record output means 8 includes a backup record input buffer 6
A, the recovery target file 9A stored in 6B,
The backup record of 9B is output to a predetermined position of the recovery target files 9A and 9B based on the position information of the backup record.

Next, the operation of this embodiment will be described with reference to the schematic flowchart of FIG.

When control is passed to the file recovery process 2, control is passed to the backup record input means in step 11.

In step 11, the backup record input means 3 of the file recovery process 2 transfers the backup records from the assigned backup media 1A, 1B to the backup record input buffers 6A, 6B corresponding to the respective backup media 1A, 1B. Enter In step 12, the backup record input in step 11 is checked, and if all the backup records are gone, the file recovery process ends.

In step 13, the recovery target file backup record judging means 7 of the file recovery process 2 executes a backup record input buffer 6A, 6
It is determined whether the backup record input to B is the backup record of the recovery target files 9A and 9B, and if it is not the backup record of the recovery target files 9A and 9B, the control is passed to step 11 to input the next backup record.

In step 14, the recovery target file backup record output means 8 of the file recovery process 2 determines the backup records of the recovery target files 9A and 9B based on the position information of the backup records. Output to the position and input the next backup record.

Next, the operation of the backup record input means will be described with reference to the schematic flowchart of the backup record input means of FIG. When the control is transferred to the backup record input unit 3 of the file recovery process 2, the control is performed using the control flag so that the control is equally transferred to all the backup media 9A and 9B allocated in step 21.

In steps 22 and 23, the empty state of each backup record input buffer 6A, 6B is determined. In steps 24 and 25, if the backup record input buffers 6A and 6B determined in steps 22 and 23 are usable, the backup records are input from the backup media 10A and 10B.

Next, the format of the backup record will be described using the backup record format of FIG. In the figure, 30 is the logical record image of the backup record, 31 is the name of the backed up file,
32 is a unique number of the backed up file, 34 is a physical record image of the backed up file,
Reference numeral 33 denotes the start relative address of the physical record image 34 of the backed up file.

The recovery target file backup record determination means 7 of the file recovery process 2 determines the recovery target file based on the file name 31 of the backed-up file and the unique number 32 of the backed-up file in the logical image 30 of the backup record. It is determined whether the file is a backup record of the files 9A and 9B.

The file-to-be-recovered record output means 8 of the file recovery process 2 outputs a unique number 32 of the backed-up file of the logical image 30 of the backup record and a start relative address 3 of the physical record image 34 of the backed-up file.
Then, the physical record image 34 of the backed up file is output to the recovery target files 9A and 9B based on the file No.

[0021]

As described above, according to the present invention, in a file recovery method of a computer system in which a backup medium has a plurality of volumes, a means for a file recovery process to simultaneously assign a backup medium of a plurality of volumes and a file recovery process are simultaneously assigned. Means for controlling the backup records to be input one record at a time from the plurality of backup media by checking the free space of the buffer, and the file recovery process transferring the backup records from the backup media to the buffers corresponding to the plurality of backup media assigned respectively. A means for inputting a backup record from another backup medium without waiting for completion of input, and a method for backing up a backup record input from a backup medium by a file recovery process. Means for determining whether the file is a backup record of the file to be recovered based on the file information in the file, and means for the file recovery process to output to a predetermined position of the file to be recovered based on the position information in the backup record. , The backup process is performed while the backup media of a plurality of volumes are processed in parallel, so that a file recovery method that can reduce the time required for the file recovery process can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a file recovery method according to an embodiment of the present invention.

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

FIG. 3 is a flowchart showing the operation of a backup record input unit.

FIG. 4 is a backup record format.

[Explanation of symbols]

1A, 1B Backup medium 2 File recovery process 3 Backup record input means 4 Backup medium control means 5 Backup record input buffer control means 6A, 6B Backup record input buffer 7 Recovery target file backup record judgment means 8 Recovery target file backup record output means 9A , 9B Recovery target file

Continuation of the front page (56) References JP-A-2-282840 (JP, A) JP-A-2-247747 (JP, A) JP-A-3-62139 (JP, A) JP-A-3-278251 (JP) , A) Invention Association Publication Technical Report No. 89-3681 (58) Fields investigated (Int. Cl. ⁶ , DB name) G06F 12/00 531

Claims (1)

(57) [Claims] 1. A file recovery methods of a computer system to the backup medium is more volumes, and means for the file recovery process allocates the <br/> backup medium of the multiple volumes at the same time, the file recovery process is allocated at the same time Means for controlling the backup records to be input one record at a time from the plurality of backup media while checking the free space of the buffer; and storing the backup media in a buffer corresponding to each of the plurality of backup media to which the file recovery process is assigned. Means for inputting the backup record from another backup medium without waiting for completion of inputting the backup record from another backup medium; and Means for determining whether the backup record of the recovery target file precoding based on the file information in the backup records, a defined the recovery target file based on the file recovery process position information in said backup records A file recovery method, comprising: a means for outputting to a set position;