| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique that considers an AG for a devastating disaster countermeasure, is low in processing cost, and has little deviation in duplicated data in a decentralized processing system.SOLUTION: A management device 4 of the present invention includes: a storage unit 41 that stores ID space management information 411 managing position of a node 5 in an ID space and node management information 413 managing correspondence between the node 5 and an AG to which the node 5 belongs to if the number of AGs, which are the same failure range in a physical area, is N; and a processing unit 42 that evenly divides the ID space into N×(N-1) sub-spaces, disposes (N-1) AGs among the plurality of AGs in the ID space such that a combination of two adjacent AGs and order are all different, and that has any of nodes 5 which belong to a next AG in a prescribed round direction from owner data in the ID space store buddy data which is a duplicate of the owner data with the use of the ID space management information 411 and the node management information 413. |
