摘要 |
PROBLEM TO BE SOLVED: To improve the utilization efficiency of server devices by distributing and disposing redundancy of operation data groups to other devices.SOLUTION: Each of a plurality of server devices includes a data processing unit that generates an operation data group belonging to a responsible group which is a group for which the server device is responsible, by processing an input data group of the responsible group; and a data storage unit that stores the operation data group. The data processing unit holds the operation data group belonging to the responsible group as an operation cache data group, the data storage unit stores a redundant data group that is a copy of the operation data group belonging to the responsible group in a data storage unit of a server device that does not store the redundant data group, and the data processing unit holds a redundant cache data group that is a copy of a redundant data group belonging to a second non-responsible group that is different from the group to which the redundant data group belonging to a first non-responsible group which is stored in the data storage unit.SELECTED DRAWING: Figure 1 |