JP2864871B2 - Computer center backup 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 computer center backup system, in particular, a computer for performing on-line and batch business processing in its own area in each of two computer centers and an on-line and batch business processing in another area when a disaster occurs in another area. The present invention relates to a computer center backup method for a computer system having a computer for performing the operation.

[0002]

2. Description of the Related Art Conventionally, in this type of computer center backup system, each computer center saves a business master file to a magnetic tape or a magnetic disk pack at regular intervals, for example, every week, and further updates the business master file. Evacuate record journals on magnetic tapes or magnetic disk packs every day, store them in quarantine or send them to other computer centers, and use a backup computer at another computer center to create a business master file immediately before the disaster at the time of the disaster. As a result, business processes are taken over.

[0003]

The above-mentioned conventional computer center backup method first requires securing a magnetic tape or a magnetic disk pack for isolating a master file having a huge capacity and a storage place. Secondly, in operation, a huge amount of data is evacuated after the end of daily work, and then a large number of people are required to transport magnetic tapes or magnetic disk packs for quarantine storage, and thirdly, recovery performance From the viewpoint, when the disaster occurred, before the work was performed at another computer center, the master file evacuated closest to the time of the disaster from the regularly evacuated master files was temporarily loaded on the disk device and the master was evacuated. From the next day to the time of the disaster, update the master update record journal sequentially, and update the master file immediately before the disaster. To the content, can not be carried out of the business also 2-3 days from the disaster generated by the scale of the system, there is a problem in that.

[0004]

According to the computer center backup method of the present invention, a first computer for performing on-line and batch business processing in its own area is provided to each of two computer centers, and another computer center is used in another area when a disaster occurs in another area. Start online and batch business processing after creating the newest business master file before the disaster
In a computer center backup method of a computer system including a computer and a computer, the first computer accumulates an electronic message input in an online business in an input electronic message file, and communicates the accumulated content after the previous transfer in the first cycle. First transfer means for transferring to another computer center via a line, and storing the updated contents of the business master file in an update journal file, and storing the updated contents after a previous transfer in a second cycle longer than the first cycle A second transfer means for transferring the contents to the other computer center via a communication line, and a third means for transferring the contents to another computer center via the communication line every time a batch job input file is input. Transferring means for transferring the update journal file from another computer center. A first updating means for updating the contents of the other center backup master file with this content each time it receives the batch job input file; The second to update the contents of the file
And a third updating means for receiving the switching request due to the disaster, receiving the other center backup master file from another computer center, and performing processing by using the stored telegram to update the same. .

[0005] In the above configuration, the batch processing during the online business processing in the computer center is normally performed within a range that does not update the business master file, and the processing that may update the business master file in the batch processing is performed. This is effective because it is performed after the end of online operation.

[0006]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment of the present invention.
The embodiment of FIG. 1 shows a case in which two computer centers are located in Tokyo and Kyoto, respectively, and always perform business in East Japan and West Japan, respectively. The computer center 1 in Tokyo and the computer center 2 in Kyoto have the same configuration, but since both centers operate symmetrically for backup, the files in FIG. 1 show only those necessary for explanation. That is, the computer center 1 stores the computer 10 for business processing in East Japan, the computer 11 for backup of business processing in West Japan, and the batch job input file 12, business master file, update journal file 14, and input message file 15 belonging to the computer 10. Have
The computer center 2 includes a computer 20 for business processing in West Japan, a computer 12 for backup of business processing in East Japan, and another center batch job input file 26, other center update journal file 27, and other center input message storage file 28 belonging to the computer 21. , Has another center backup master file 29,
The computer 11 and the computer 21 are connected by a high-speed dedicated line 3. Further, the computer 10 and the computer 20 are provided with a plurality of message input terminals 101 and 201 connected via dedicated lines or public lines, respectively.

In the above configuration, the computer 10 inputs the online message input from the message input terminal 101 to the input message file 15, performs business processing, and updates the business master file 13. At this time, the business master file is updated. Only the updated contents of the file 13 are extracted and stored in the update journal file 14. Further, the computer 10 performs only the process of not updating the job master file 13 even if data is input to the batch job input file 12 within the processing time of the online job during the batch job processing time. A process for updating the business master file 13 is also performed.

[0009] On the other hand, the computer 10 sends the input message file 15 every 200 milliseconds, the update journal file 14 every hour, for example, and the batch job input file 12 when the file is input. It instructs the computer 11 to transfer these files to the computer center 2 via the inter-host communication mechanism 30. The computer 10 clears the input message file 15 and the update journal file 14 after transfer, and the batch job input file 12 is used by the computer 10 for batch processing after transfer.

The computer 11 transfers the input message file 15, the update journal file 14, and the batch job input file 12 to the computer 21 of the computer center 2 via the dedicated line 3 according to the instructions of the computer 10. The computer 21 stores the contents of the transferred input message file 15 in the other center input message storage file 28 and updates the updated journal file 1.
4 to the other center update journal file 27,
The contents of the batch job input file 12 are stored in the other center batch job input file 26, respectively. And
The computer 11 updates the other-center backup master file 29 with the contents each time it is stored in the other-center update journal file 27, and performs the same processing as the computer 10 performs with the contents of the other-center batch job input file 26. Then, the other center backup master file 29 is updated. When the update journal file 27 receives a new update journal from the computer 11, the contents stored in the other center input message storage file 28 are cleared.

The computer center 1 and the computer center 2 always perform the above processing.

FIG. 2 is a diagram for explaining the processing at the time of disaster of the computer center 1 in the embodiment of FIG. When the operator of the computer center 2 knows that the computer center 1 cannot be processed due to the disaster and inputs a backup switching instruction via a console (not shown) of the computer 21, the computer 21 first communicates with the dedicated line 3 and the computer 20. The input / output processing of the inter-host communication mechanism 40 is stopped, and the other center backup master file 29 by the other center update journal file 27
After confirming the latest update status, the other center input message storage file 28 is sequentially processed to update the contents of the other center backup master file 29 to the contents of the business master file 13 immediately before the disaster. Next, the telegraphic input terminal 101 for East Japan is pulled into the computer 21 via a spare dedicated line or a public line.

[0013]

As described above, according to the present invention, a batch job input file of another computer center, which has a minimum capacity for batch processing, is transferred via a dedicated line, and the same processing as that of the other center is performed. The master file is matched, and for the online processing, the update contents of the business master file of another center, for example, every hour are transferred, the business master file is updated, and the input message from the terminal is sent, for example, every 200 milliseconds. Since it is acquired and accumulated, the same business master file as the business master file of the other center can be created in 1 to 2 hours when another center is damaged, and there is an effect that the backup can be performed quickly. Also, by reducing the amount of transferred data, there is no need to send the saved storage media manually, and it is not necessary to save the work master file after the work is completed, or to keep the storage media isolated and its location. This also has the effect of greatly saving money.

[Brief description of the drawings]

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

FIG. 2 is a diagram for explaining a process at the time of a disaster in the embodiment of FIG. 1;

[Explanation of symbols]

 1, 2 Computer center 3 Dedicated line 10, 11, 20, 21 Computer 12 Batch job input file 13 Business master file 14 Update journal file 15 Input message file 26 Other center batch job input file 27 Other center update journal file 28 Other center input Message storage file 29 Other center backup master file 30, 40 Communication mechanism between hosts 101, 201 Message input terminal

Continuation of front page (56) References JP-A-62-57030 (JP, A) JP-A-3-250257 (JP, A) JP-A-57-30069 (JP, A) JP-A-1-196638 (JP) (A) JP-A-3-256144 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06F 12/00 G06F 11/20 G06F 15/16

Claims (1)

(57) [Claims] 1. A first computer which performs on-line and batch business processing in its own area in each of two computer centers and the on-line and batch business processing in another area in the event of a disaster in another area. In a computer center backup method of a computer system including a second computer that starts after creating a master file, the first computer accumulates an electronic message input in an online business in an input electronic message file, and A first transfer means for transferring the contents accumulated after the previous transfer in a cycle to another computer center via a communication line, and accumulating updated contents of the business master file in an update journal file; The contents accumulated after the previous transfer in the long second cycle are transferred to another computer via the communication line. A second transfer means for transferring the contents of the batch job input file to another computer center via a communication line each time the batch job input file is input. The first update means updates the contents of the backup master file with the contents each time the update journal file is transferred from another computer center. Each time the batch job input file is transferred, Second updating means for processing the contents and updating the contents of the other-center backup master file as needed; and receiving and storing the other-center backup master file from another computer center in response to a switching request due to a disaster. And a third updating unit for performing an update by performing a process based on a telegram. Computer center backup method.