| 摘要 |
PROBLEM TO BE SOLVED: To continue a service by achieving a balance of the redundancy between data and suppressing the disassembly of a cluster system.SOLUTION: A server device 2 which is included in a cluster system 1 includes: a memory 25 that holds replicated data or/and original data which include(s) meta data and actual data and to which a replication number is given; a memory usage amount measuring unit 22 that measures the usage amount of the memory 25; and a replicated data deletion/recovery processing unit 23 that, if the usage amount of the memory 25 is a first threshold value or more, determines the presence/absence of the actual data of the replicated data in a predetermined order of replication numbers and, if the actual data of the replicated data is present, deletes it from the memory 25. |
