JP2000353117A - Method for backing up computer system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a computer system to correspond to the restoration of a fault even when the computer system has also a transaction file or the like in addition to a master file shared by on-line operation and batch operation to be driven in parallel in the computer system. SOLUTION: An operation center acquires the updating/output image records of all files such as transaction files 140, 150 in addition to a master file 130 shared by on-line operation and batch operation. The operation center collectively transmits these image records to a remote backup center through a network 100 as required. The backup center separates the collectively received records in each file of the operation center and updates or outputs respective separated records to backup files 260, 270, 280 prepared so as to correspond to respective files of the operation center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for backing up a computer system in online operation and batch operation in parallel.

[0002]

2. Description of the Related Art In recent years, as competition for services of financial institutions in Japan has intensified due to financial liberalization and the like, extension of online operations such as ATMs has become urgent. Some financial institutions have already started 24-hour ATM operation (24-hour online business service). Even in the needs of such an era, batch work is not eliminated. Therefore, it is essential to construct a non-stop operation system that enables the parallel operation of the online operation and the batch operation.

[0003]

By the way, although there are many computer systems in which an online job and a batch job are running in parallel, under the computer system environment, an online job and a batch job share the same master file. In some cases. Here, the master file is generally constructed using a VSAM file, and a system journal (refer image journal and after image journal) can be acquired from the VSAM file.

[0004] When the same master file (master) is shared between the online job and the batch job, the following problems occur. For example, if a computer system is operating and is damaged by a large-scale earthquake or the like, even if the original master file is restored from the system journal (especially after-image journal) of the shared master file, online operations and Batch operations cannot be resumed. This is because, in addition to the master file, there are files such as transaction files that are output and updated in batch operations and online operations.

Therefore, if these transaction files and the like are not restored, restarting from the state immediately before the disaster is impossible, and in order to restart, a system journal (particularly an after image journal) such as a transaction file is also acquired. There is a need. However, in a normal computer system, the system journal acquisition function targets a VSAM file but does not target a standard organization file. Since most of the transaction files to be recovered are standard organization files, the system journal cannot be acquired.

FIG. 3 shows the configuration of such a normal computer system. As shown in the drawing, the online job 10 and the batch job 20 share a master file based on a VSAM file, and perform, for example, an update process from record a to record b. At the time of recovery after the occurrence of a failure, a journal using a VSAM file can be acquired. However, the batch job has a transaction file based on the standard organization file, and performs, for example, additional output processing of records d and e. At the time of recovery after the occurrence of a failure, a journal using the standard organization file cannot be acquired for this transaction file.

As described above, in an environment where an online job and a batch job share the same master file, the system journal for the transaction file cannot be acquired. If restarting after recovery is impossible and if recovery measures in case of failure are required, online operation and batch operation cannot be performed in parallel.

Accordingly, an object of the present invention is to provide a backup method of a computer system which can cope with a failure even when a transaction file or the like is provided in addition to sharing a master file between an online job and a batch job which operate in parallel. It is in.

[0009]

In order to achieve the above object, the present invention provides a method for backing up a computer system in which an online job and a batch job are operated in parallel.
A backup center is provided in a remote location of the business center that performs the online business and the batch business in parallel. In the business center, the online job for executing the online business and the batch job for executing the batch business are all used for each business. The after-image record after updating and outputting the file is stored in the after-image record file as needed, and the record stored in the after-image record file is transmitted to the backup center via a network. Receiving the after-image record file from the center, and updating or outputting a record to a backup file provided corresponding to each file in the business center based on the after-image record file. Characterized in that to perform the.

In the computer system backup method according to the present invention, the updating of each file in the business center,
By backing up the output records to the respective files on the backup center as needed, it is possible to reproduce a complete after-image record using the respective files on the backup center at the time of recovery in the event of a failure. Therefore, even in an environment where the online job and the batch job share the same master file, the parallel operation of the online job and the batch job that requires the recovery from a failure is possible.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a computer system backup method according to the present invention will be described below. The backup method of the computer system according to the present embodiment differs from the conventional system journal in that not only the master file but also the record update / output images (after-image records) of all files such as transaction files are acquired. Even in an environment where the online job and the batch job share the same master file, the online job and the batch job can be operated in parallel, and the acquired record update / output image is transferred to the remote system. By updating the same file (backup file) backed up in the remote place as needed, an environment in which the operation of this system can be taken over by the remote place system even in the event of a disaster such as a large-scale earthquake is provided.

FIG. 1 is a block diagram showing a configuration of a computer system to which a backup method according to the present embodiment is applied. The computer system according to the present embodiment connects a business center that performs actual work and a remote backup center that backs up the business center via a network 100, and stores after-image records of various files in the center system in a remote place. Backup.

The business center is an online job 110
, Batch job 120 and shared master file 130
, A transaction file 140, another output file 150, an after-image record (AF) file 160, and a backup transmission job 170. The online job 110 performs an update process on each record stored in the shared master file 130 and outputs a newly created additional record to the output file 150. Batch job 12
0 performs update processing on each record stored in the shared master file 130 and outputs newly generated additional records to the transaction file 140.

The shared master file 130 is constructed by a VSAM file,
0 and other output files 150 are constructed from standard organization files. In addition, online job 11
0, the batch job 120 outputs to the AF file 160 an image record (after-image record) after updating or outputting the file for each job. The backup transmission job 170 is the AF file 1
The after-image record 60 is read and the after-image record is transmitted to a remote system (backup center) as needed.

On the other hand, the backup center performs a backup reception job 210, an AF file 220, a backup separation job 230, and a temporary output file 240
A, 240B, 240C and backup update job 2
50A, 250B, 250C, backup shared master file 260, and transaction file 2
70 and other output files 280. In such a configuration, the backup reception job 210 that has received the after-image record via the network 100 outputs the after-image record to the AF file 220.

The backup separation job 230 reads the after-image record of the AF file 220 and separates each of the shared master file 130, the transaction file 140, and the other output files 150. Then, the separated after-image records are stored in the temporary output files 240A, 240B, 240
Output to C. Backup update jobs 250A, 25
0B and 250C are temporary output files 240A and 240
B, 240C are read and the corresponding backup files 260, 270, 280 are updated (output).

Next, a specific operation example of the backup method in the computer system having the above configuration is shown in FIG.
It will be described based on. First, the online job 110
Updates the record B of the shared master file 130 to the record C and outputs the record A. At that time, the updated image C and the output image A are output to the AF file 160 as one record (record F). On the other hand, the batch job 120
Is updated to record D, and record E is output. At this time, the updated image record D and the output image record E are output to the AF file 160 as one record (record G).

The backup transmission job 170 includes an after-image record (record F,
G) is read and transmitted as needed to the backup reception job 210 of the backup center via the network 100. The conditions for transmitting a record by the backup transmission job 170 include, for example, a method of starting at a fixed time interval and a method of starting according to the data amount of the AF file 160. It should be set appropriately in consideration of the above.

The backup reception job 210 receives an after-image record (records F and G) through the network 100 and outputs it to the AF file 220. The backup separation job 230 reads the after-image record of the AF file 220, separates the record F into the record C and the record A, separates the record G into the record D and the record E, and respectively corresponds to the corresponding temporary output file 240A, 240B, 240C
Output to

The backup update job 250A reads the record A of the temporary output file 240A and outputs this to the backup output file 280. The backup update job 250B reads the records C and D of the temporary output file 240B, sorts them in the order of updating, updates the record B of the backup common master file 260 to the record C, and updates the record C to the record D. I do. Further, the backup update job 250C reads the record E of the temporary output file 240C and outputs this to the backup transaction file 270.

As described above, the update and output record of each of the files 130, 140, 150 in the business center are updated as needed in the respective files 260, 27 of the backup center.
By making a backup at 0 or 280, a complete after-image record can be reproduced using each file on the backup center side at the time of restoration in the event of a failure. Therefore, even in an environment where the online job and the batch job share the same master file, the parallel operation of the online job and the batch job that requires the recovery from a failure is possible. In this embodiment, the backup file is updated (output) together with the update (output) image of each file in each business unit, so that after a failure such as a disaster occurs, a failure occurs in a remote system. Restart processing is possible from the point in time.

[0022]

As described above, in the computer system backup method of the present invention, the update and output records of each file in the business center are backed up to each file in the backup center as needed.
At the time of recovery in the event of a failure, complete after-image records can be reproduced using each file on the backup center. Therefore, even in an environment where an online job and a batch job share the same master file, unlike the conventional system journal, it is possible to back up not only the master file but also the records of all files such as transaction files. Thus, it is possible to perform online work and batch work in parallel, which require recovery measures at the time of failure.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a computer system to which a backup method according to an embodiment of the present invention has been applied.

FIG. 2 is a block diagram showing a specific operation example of the computer system shown in FIG.

FIG. 3 is a block diagram illustrating a configuration example of a normal computer system.

[Explanation of symbols]

100: network, 110: online job, 120: batch job, 130: shared master file, 140: transaction file, 150
…… Output file, 160 …… AF file, 170…
… Backup transmission job, 210… Backup reception job, 220… AF file, 230… Backup separation job, 240A, 240B, 240C…
Temporary output files, 250A, 250B, 250C ...
Backup update job, 260A: Backup shared master file, 260B: Backup transaction file, 260C: Backup output file.

Claims (6)

[Claims] 1. A method for backing up a computer system that runs an online job and a batch job in parallel, comprising: providing a backup center at a remote location from a job center that runs the online job and the batch job in parallel; The online job that executes the batch job and the batch job that executes the batch job store the after-image record after updating and outputting all the files used for each job in the after-image record file as needed, and store the after-image record file in the after-image record file. The stored record is transmitted to the backup center via a network. The backup center receives an after-image record file from the business center, and, based on the after-image record file, A backup method for a computer system, wherein a record is updated or output to a backup file provided corresponding to each file in the business center. 2. The file used for the online business and the batch business includes a master file commonly used in each business, and a transaction file and other output files used individually in each business. Item 7. A backup method for a computer system according to Item 1. 3. The computer system backup method according to claim 2, wherein said master file is constructed by a VSAM file, and said transaction file and other output files are constructed by a standard organization file. 4. The computer system backup method according to claim 1, wherein the online job and the batch job store the after-image record in the after-image record file as needed in each business unit. 5. The business center sends the after-image records of all the files together to the backup center, and the backup center stores the after-image records received from the business center for each file in the business center. 2. The computer system backup method according to claim 1, wherein update processing or output processing is performed on a backup file provided for each file in the business center. 6. In the online job or the batch job, when there is an after-image record by an update process and an after-image record by an output process in the same business unit, the records are collectively combined into one record as the after-image record. 6. The method according to claim 5, wherein the file is stored in a file and transmitted to the backup center.