| 摘要 |
PROBLEM TO BE SOLVED: To perform equivalence processing between a master DB and a replica DB existing in a plurality of servers connected to a network without performing retransmitting processing of update data. SOLUTION: In the database equivalence system for performing data equivalence processing between a master DB 101 provided in a computer 102 and a replica DB 103 provided in a computer 104 connected to the computer 102 through the network 120, the computer 102 generates equivalence data 108 by adding past update data to new update data 106 for the master DB 101 and transmits the data to the computer 104. The computer 104 updates the replica DB 103 by use of update data not applied to the replica DB 103 of the update data extracted from the received equivalence data 108. COPYRIGHT: (C)2009,JPO&INPIT
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