| 摘要 |
PROBLEM TO BE SOLVED: To provide a synchronization method in a multiplex database system where any inconsistency between databases is not generated even when a plurality of transactions are processed in parallel. SOLUTION: A mediation device 200 detects inconsistency between processing results 100 or the no-response of the server 100, and when detecting the inconsistency of the processing results, selects one response from the responses, and disconnects the server 100 which has returned any response other than the selected response from the system, and when detecting the no response of the server 100, disconnects the server 100 with no-response from the system, and operates the synchronization processing of the server 100 disconnected from the system and the normally operating server 100 built in the system, and when completing the synchronization processing, incorporates the server 100 disconnected from the system in this system again. COPYRIGHT: (C)2007,JPO&INPIT
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