Hitachi, Ltd.

Hitachi Software Engineering Company, Ltd.

Shuji Shimada

Akira Ito

Kiyonori Hara

In a system cooperating a high performance computer and a low performance computer, a load of database processing upon the low performance computer is reduced. In a high performance center running DBMS for managing each version by using logical structure data of a database as physical structure pages 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.

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Yokohama, Japan

Shuji Shimada