Recoverable data replication between source site and destination

Details Recoverable data replication between source site and destination Recoverable data replication between source site and destination

1996-12-19

1998-07-14

Swann, Tod R.

Data processing: database and file management or data structures

Database design

Data structure types

39518202, 39520062, G06F 1100, G06F 1300

Patent

active

057819122

ABSTRACT:
A method and system are provided for recovering after a failure in a data replication environment. According to the method, a transaction is executed at a source site that makes changes that must be replicated at a destination site. The changes are made permanent at the source site. The changes are made permanent at the source site without the source site being informed as to whether the changes were successfully applied at the destination site. The changes are sent to the destination site. The changes are applied at the destination site. If the changes are successfully applied before the failure, then the changes are made permanent at the destination site and a record is added to a set of records at the destination site. The record indicates that the changes where made permanent at the destination site. After a failure, the set of records at the destination site are used to determine which changes must be sent from the source site to the destination site after the failure.

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