REPLICATION DATABASE MISMATCHING AVOIDING DEVICE AND AVOIDING METHOD

摘要

PROBLEM TO BE SOLVED: To make metallic data an object of replication by executing replication when the updation time of a record performing replication is before the latest replication execution time and notifying an error when the updation time is after the latest replication execution time. ;SOLUTION: A replication file 7 is managed by a replication information part 8. When replication execution time is acquired as replication execution preprocessing and all of records are updated with replication information, it is regarded as normal ending. A record number (identifier that uniquely recognizes records in a database) of an updation processing object is acquired, and log intra-journal updation time of the record number is acquired. The latest replication execution time is compared with updation time, and when the updation time is after the replication execution time, it is considered as an error because there is possibility that data mismatching may occur. When updation information after the latest replication execution time does not exist, the reflection of replica information is performed.;COPYRIGHT: (C)1999,JPO