| 摘要 |
PROBLEM TO BE SOLVED: To reduce a load of database processing upon a low performance computer in a system cooperating a high performance computer and the low performance computer. SOLUTION: In a high performance center running DBMS for managing each version by using a table being a logical structure as pages being a physical structure to be stored in the file of a disk device, and one or more terminals having a lower performance than that of the center, an update difference file is created for a center side received command input to the center, a backup file is created for a terminal side received command input to the terminal, and a version applied with the terminal side received command is updated to a version after update, by sequentially overwrite copying the backup file and update difference file. COPYRIGHT: (C)2009,JPO&INPIT
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