| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a database system for preventing new update data generated at and after a repair start time point of a database from being left untreated. <P>SOLUTION: When a first database device 1 is restored from a fault, a first DB reflection tool 10a requests transmission of update data stored in a second database 11b to a second data server 12b provided in a second database device 2 under normal operation, acquires the update data from the time of the fault to the time of the request stored in the second database 11b, preserves it in the first database 11a and repairs it. When there is new update data for n cycles in the second database 11b in the period of repair, the second data server 12b sends the new update data for the n cycles to the first DB reflection tool 10a, and the first DB reflection tool 10a additionally preserves the transmitted new update data for n cycles in the first data base 11a. <P>COPYRIGHT: (C)2013,JPO&INPIT |
