| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly convenient technology for failure recovery in a cluster system. SOLUTION: A plurality of history storage devices are provided which are each associated with each node 110 of the cluster system 100. Each node 110, during normal operation of a data storage device 120, records an access history in both history storage devices. If the data storage device 120 is partially out of order, at first, recording in a main history storage device 130 is maintained, and meanwhile recording in an auxiliary storage device 132 is stopped. Then, one node to execute failure recovery processing is connected to the auxiliary history storage device 132 associated with the respective nodes 110 and executes failure recovery processing with reference to the access history. In parallel with this failure recovery processing, the respective nodes 110 continue access to data not affected by the failure, and record the access history in the main history storage device 130. Thereby, both failure recovery processing and access to normal data are implemented concurrently. COPYRIGHT: (C)2009,JPO&INPIT
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