| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique capable of performing replication processing at high speed by performing data replications between a master data server and replica data servers in parallel. SOLUTION: A database difference confirmation means compares a list of grouping IDs and latest history sequence number values recorded in a master database update history database and a list of grouping IDs and latest history sequence number values recorded in a replica database update history database through a database difference confirmation means. When a difference is detected at the result, the database difference confirmation means requests update of replica databases to a database difference transmitting means. The database difference transmitting means, database difference receiving means and replica database update means are present by the number corresponding to the number of kinds of grouping IDs, and parallel update of replica databases is performed for every grouping ID. COPYRIGHT: (C)2007,JPO&INPIT
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