| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce a processing time of batch processing accompanied by a backup, in a database management system. Ž<P>SOLUTION: A backup processing part 26 writes data at prescribed time of a database stored in a storage device out of the database after the prescribed time as backup data. When an update request for data not written out as the backup data occurs in a data access request after the prescribed time, a DB access processing part 25 writes the data at the prescribed time out of the database as the backup data and updates the written-out data to the database according to the update request. The backup processing part 26 and the DB access processing part 25 perform processing in parallel. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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