| 摘要 |
PROBLEM TO BE SOLVED: To select the optimum accumulation servers comprising a single or a plurality of accumulation server groups in response to a resource condition of the accumulation server of mirroring a data. SOLUTION: A control part 3 on an ether switch 1 monitors periodically the resource condition of the accumulation server group 6, writes information into a resource table 2 prepared in every accumulation server, to be analyzed, selects the optimum accumulation server, based on the information in the resource table 2 from the accumulation server group 6, when a resource of accumulation server mirroring a current data is judged to be deficient, and switches a mirroring side while preventing a data loss. COPYRIGHT: (C)2009,JPO&INPIT
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