JPH03192439A - On-line file backup possessing and synchronizing system for data base shared system - Google Patents

On-line file backup possessing and synchronizing system for data base shared system

Info

Publication number
JPH03192439A
JPH03192439A JP33357089A JP33357089A JPH03192439A JP H03192439 A JPH03192439 A JP H03192439A JP 33357089 A JP33357089 A JP 33357089A JP 33357089 A JP33357089 A JP 33357089A JP H03192439 A JPH03192439 A JP H03192439A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
online
system
backup
synchronizing
command
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP33357089A
Other versions
JP2901675B2 (en )
Inventor
Shinichi Iwashita
Yasufumi Mita
Original Assignee
Hitachi Ltd
Hitachi Software Eng Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Abstract

PURPOSE: To shorten time for restoring the fault of a data base by temporarily stopping each online system, synchronizing a backup acquisition time point and making a journal after synchronizing objective when acquiring the backup during the online.
CONSTITUTION: When a command (backup acquesition starting request) is put into an online system A23 and this command is communicated through a communication equipment, which mutually connects data units 21 and 22, to another online system B24, the activation of a new processing is suppressed and all the online system are temporarily stopped. Further, it is communicated that the completion of synchronizing with the other online system B24 while waiting for the end of a processing under execution. Afterwards, when all the online systems are synchronized, an ID is added to the journal to be acquired later and the activation suppression of the new processing is canceled. When the acquisition of the backup is completed, a command to request the end of the backup acquisition is put into any one of the online systems. Thus, since a file is restored by using the file journal after the start of the backup, fault restoring time can be shortened.
COPYRIGHT: (C)1991,JPO&Japio
JP33357089A 1989-12-22 1989-12-22 File backup acquisition synchronization method Expired - Lifetime JP2901675B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33357089A JP2901675B2 (en) 1989-12-22 1989-12-22 File backup acquisition synchronization method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33357089A JP2901675B2 (en) 1989-12-22 1989-12-22 File backup acquisition synchronization method

Publications (2)

Publication Number Publication Date
JPH03192439A true true JPH03192439A (en) 1991-08-22
JP2901675B2 JP2901675B2 (en) 1999-06-07

Family

ID=18267522

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33357089A Expired - Lifetime JP2901675B2 (en) 1989-12-22 1989-12-22 File backup acquisition synchronization method

Country Status (1)

Country Link
JP (1) JP2901675B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997024668A1 (en) * 1995-12-28 1997-07-10 Ipl Systems, Inc. Dasd storage back up including back up synchronization across multiple dasd

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997024668A1 (en) * 1995-12-28 1997-07-10 Ipl Systems, Inc. Dasd storage back up including back up synchronization across multiple dasd

Also Published As

Publication number Publication date Type
JP2901675B2 (en) 1999-06-07 grant

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