Cluster fault estimation system

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PROBLEM TO BE SOLVED : To detect only a faulty node precisely from among a plurality of nodes which constitute a cluster in a cluster system having the plurality of nodes. SOLUTION : A request stop node selection means 81 selects a node to which request distribution is stopped out of a plurality of fault monitored nodes 6 which constitute the cluster. A request stop means 41 stops distributing requests to the selected node. A rare node calculation means 84 acquires detailed information on the selected node from a detailed information storage part 83 and uses the detailed information to calculate a node showing a pattern in which use status of resources are different from other fault monitored nodes 6 from among the plurality of fault monitored nodes 6. A cluster obstacle estimation means 85 uses a calculation result calculated by the rare node calculation means 84 to detect a node in abnormal state. COPYRIGHT : (C)2007, JPO&INPIT