JPH1139273A - Remote backup system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote backup system which can back up a computer which is operated in a production run without giving any influence to the original duty of the computer and can take over the duty of the computer when a disaster occurs. SOLUTION: A backup computer 2 is connected to a computer 1 which is operated in a production run through a network. The computer 1 is provided with an on-line processing section 10 which outputs the history of the updating image of a file 4 to be backed up to a history storing file and a file transfer control section 11 which transfers the history of the updating image outputted upon request from a terminal 8 to the backup computer 2 with the swapping operations of the history storing file as a turning-point. The backup computer 2 is provided with a data restoration processing section 21 which updates a file 6 to be backed up by using the history of the transferred updating image and connected to the terminal 8 through a backup network 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to computer backup processing, and in particular, when a production computer becomes unusable due to a disaster, it is possible to switch to a backup computer installed in a remote location for backup. Regarding possible data backup methods.

[0002]

2. Description of the Related Art The first type of this type of data backup system is described.
Japanese Patent Application Laid-Open No. 7-146849 is disclosed as a case of the above. In the conventional method, the transaction data is transmitted to the backup host computer at the same time as the transaction processing is executed.

As a second case, Japanese Patent Application Laid-Open No. 7-2539
48 are disclosed. In this conventional method, after the update business service ends, the update transaction information accumulated so far is transmitted to the backup computer.

[0004]

In the method of the first case, data must be transmitted to the backup computer within one transaction process, and the update process of the backup file must be completed. The transaction processing load is very high. Further, a process for exchanging data with the backup computer must be added to a program constituting each transaction, which complicates the configuration of the system.

[0005] In the method of the second case, if a disaster occurs during online business due to the simultaneous transmission of data to the backup computer after the end of the service,
Switching is not possible.

[0006] An object of the present invention is to provide a backup system that does not affect the original business, and if a disaster occurs and the building in which the computer system is installed is destroyed and a fire occurs, a remote location away from the disaster site It is to improve the reliability and operability of a computer system by switching to a backup computer installed in the ground.

[0007]

SUMMARY OF THE INVENTION A remote backup method according to the present invention includes a production computer that performs online processing based on a request from a terminal connected via a network, and a production backup at a remote location. A backup computer to be executed, and in the computer system in which the production computer and the backup computer are connected via a network, the production computer outputs the history of the update image of the backup target file to a history storage file. An online processing unit and a file transfer control unit that transfers the history of the update image output under a request from the terminal to the backup computer in response to a swapping operation of the history storage file, The backup computer A data recovery processing unit that updates a file to be backed up using the history of the transferred update image, wherein the backup computer and the terminal are connected by a backup network line. And

[0008] In addition to the above, when the production computer becomes unusable, the backup computer performs business as a backup of the production computer.

In addition, in addition to the above, when the backup computer receives a message indicating that communication with the production computer is impossible from the terminal when the production computer becomes unusable, It is characterized in that business is continued as a backup of the operating computer.

[0010]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, according to a first embodiment of the present invention, a production computer 1, a backup computer 2, a backup line 3 connecting the computers 1 and 2, a production computer 1, a backup target file 4, a journal 5 for storing its updated image, and a backup target file 6 held by the backup computer 2.
A receiving journal 7 for storing the journal data transferred from the production computer 1, a terminal 8 normally connected to the production computer 1, but also having a connection line to the backup computer 2, and a production computer. A production line 31 connecting the terminal 1 and the terminal 8;
A backup line 32 connecting the backup computer 2 and the terminal 8 is included.

The production computer 1 includes an online processing unit 10 for acquiring a file update image requested online from the terminal 8 into a file update image history (hereinafter, the file update image history is referred to as a journal); A file transmission control unit 11 for transmitting the data of the journal 5 to the backup computer 2;

The backup computer 2 receives the journal data transmitted from the production computer 1 and stores it in the reception journal 7, and the data recovery that updates the backup target file 6 from the received journal. And a processing unit 21.

Next, the operation of the embodiment of the present invention will be described with reference to FIGS.

In the production computer 1, the updated image of the backup target file 4 is output to the journal file 5 under the control of the online processing unit 10 (steps S101 and S102 in the figure). Step S1
In the journal output process of 02, if a journal file that has been split is swapped,
The current journal data is transferred by the file transmission control unit 11 (steps S103 and S10).
4).

The transferred journal data is received by the backup computer 2 and output to the receiving journal file 7 (steps S201 and S20).
2). The backup target file 6 on the backup computer 2 is updated with the journal data stored in the reception journal file 7, and data backup is performed at a remote place (step 203). The backup target file 6 on the computer 2 is updated, and data backup is performed at a remote place (step S2).
03).

On the other hand, the backup computer periodically monitors the production computer through the backup line 3 and, when communication with the production computer becomes impossible, it is said that the terminal 8 cannot communicate with the production computer 1. When the message comes in, the backup computer 1 determines that a disaster has occurred in the production computer 1, and operates as a production machine.

The above operation is repeated until the online operation of the production computer 1 is completed.

Next, a specific example of the present invention will be described with reference to the drawings. Referring to FIG. 3, a host computer 101 operating in the Tokyo center, a backup computer 102 installed in the Osaka center for standby, and a high-speed digital line 103 connecting the computers 101 and 102 are shown. , Journal file 105, file 104 containing transaction ledger, etc., receiving journal file 107, file 106 containing backup transaction ledger, etc., and terminal 1
08 (Hokkaido branch, Sendai branch, Fukushima branch, ... Okinawa branch), a production line 141 connecting the terminal 108 and the computer 101, and a backup line connecting the terminal 108 and the computer 102 of each branch. 142.

The computer 101 includes a file transmission control unit 111 and an online system 110. The computer 102 has a file reception control unit 120
, A data recovery processing unit 121, and an online processing unit 130 that starts up as a production machine when a disaster occurs.

The backup process is performed according to the flowchart of FIG. The contents of the operation in FIG. 2 according to FIG. 3 are the same as the description of the operation in FIG.

The computer 101 at the Tokyo center is always connected online with each office terminal 108, and the business of the online processing unit 110 running on the computer 101 at the Tokyo center can be used. Data transacted at each branch is input from the branch terminal 108 and the file 1 such as a transaction ledger is input via the online processing unit 110
04, and the updated data is output to the journal file 105.

The journal file 105 is divided into a plurality of files, and when the journal file swap occurs due to journal output, the file transmission control unit 11
1 operates and the journal data is transferred to the high-speed digital line 10
3 and transmitted to the computer 102 of the Osaka Center, and stored in the reception journal file 107 by the file reception control unit 120. When the reception is completed, the data is restored to the file 106 such as a backup transaction ledger by the data restoration control 121.

Each office terminal 108 is also connected to the backup computer 102 of the Osaka center in the case of a disaster by a line connection. Upon starting up, the online transaction by the sales office terminal 108 can be resumed.

Further, a second embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 4, in the second embodiment, a plurality of computers 201, 202, 203, journal files 210, 220, 230, data receiving devices 205, 206, 207, receiving files 250, 2
60, 270 and the backup computer 204
, Terminal 280, backup files 240 and 24
1, 242 and backup lines 291, 292, 2
93, a production line 294, and a backup line 29
5 is included.

A plurality of host computers 201 to 203
And the data to one backup computer 2
Since the load becomes high if the data is always recovered by the continuous data recovery in 04, the journal data receiving devices (servers) 205 to 207 are provided for each computer to be backed up.
, And each of the receiving files 250 to 270
A method is effective in which journal data is stored in the backup files 240 to 242 of the backup computer 204 at the end of the online operation.

Also in this method, the journal file 210
Since 230 is always backed up, the number of procedures for restoring data to the backup computer 204 in the event of a disaster only needs to be increased, and this can be realized sufficiently.

In the above description, only a line is used as a network. However, the communication path of the network may be a connection state in which a WAN and a LAN are mixed.

In the above description, when a disaster occurs, a message from a terminal triggers a switch to a backup computer as a production machine. However, it is also possible to operate the backup computer as a production machine by manual switching.

[0031]

The first effect is that restoration in the event of a disaster is easy. As a result, normal operations can be continued without requiring much time for switching to the backup computer when a disaster occurs.

The reason is that the data is reflected in the backup computer in a near-real way, and the terminals are also preliminarily connected by the backup line, so that switching at the time of disaster is easy.

The second effect is that the load of the online transaction processing can be reduced and there is no performance deterioration.

The reason is that journal data output from online transaction processing is collected into a plurality of journal file units and sent to the host computer on the backup side. That is, the transmission control can be executed as another task without affecting the normal online processing.

A third effect is to realize a backup system without any modification of an existing operating transaction processing program.

The reason is that data transfer using a journal is performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a remote data backup method according to the present invention;

FIG. 2 is a flowchart showing data backup processing according to the embodiment of the present invention;

FIG. 3 is a configuration diagram showing a specific system example of the present invention.

FIG. 4 is a configuration diagram showing a second embodiment of the present invention.

[Explanation of symbols]

1,2,101,102,201,202,203,2
04 Computer 3,31,32,103,141,142,291,2
92,293,294,295 lines 4,5,6,7,104,105,106,107,2
10,220,230,240,241,242,25
0, 260, 270 File 205, 206, 207 Data receiving device 8, 108, 280 Terminal 10, 110, 130 Online processing unit 11, 111 File transmission control unit 20, 120 File reception control unit 21, 121 Data recovery processing unit

Claims (3)

[Claims] 1. A production computer that performs online processing based on a request from a terminal connected via a network, and a backup computer that performs backup of production at a remote location. In a computer system in which backup computers are connected via a network, the production computer outputs an update processing history of a file to be backed up to a history storage file and an online processing unit that outputs a history of the update image based on a request from the terminal A file transfer control unit that transfers the history of the updated image that has been transferred to the backup computer in response to a swapping operation of the history storage file, wherein the backup computer stores the history of the transferred update image. Using A data backup method at a remote location, comprising a data recovery processing unit for updating a backup target file, wherein the backup computer and the terminal are connected by a backup network. 2. The remote location according to claim 1, wherein when the production computer becomes unusable, the backup computer continues business as a backup of the production computer. Data backup method. 3. When the backup computer receives a message indicating that communication with the production computer is not possible from the terminal when the production computer becomes unusable, the backup computer is used as a backup of the production computer. 2. The remote backup method according to claim 1, wherein the business is continued.