| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high fault tolerance without data loss against a fault in entire applications using a distributed data management program, which handles data of which loss may cause trouble, and to improve use efficiency of each node. SOLUTION: In a certain physical node, a node eigenvalue common to the entire plurality of virtual node ID obtained by a hash function is set, while a data decision method managed by each node (the node having a node ID close to a data ID manages an object data) is maintained in the distributed data management program. Also, at the time of data ID calculation being duplicated from certain data, the probability of nodes which manages the original and the duplication of data becoming physically different is increased by the change of a point corresponding to the node eigenvalue of the data ID. COPYRIGHT: (C)2011,JPO&INPIT
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