| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce time required for reflecting data on a copy destination DB and/or time required from failure occurrence until restart of operation. <P>SOLUTION: When receiving update information for a first database or a second database, a database update controller updates the first database or the second database on the basis of the update information. In updating the first database or the second database, the database update controller holds data before the update and an identifier provided to the update information in association with each other by database. The database update controller extracts an identifier indicating the latest update information from the held identifiers for each database and identifies an identifier updated earliest among the extracted identifiers. The database update controller reflects the data before the update corresponding to an identifier of update information newer than the identified identifier on a corresponding one of the first database and the second database. <P>COPYRIGHT: (C)2013,JPO&INPIT |
