A management node that controls a hardware resource amount of a node to be allocated to a distributed data store includes: a disk device that stores an application performance model indicating a correspondence relationship between an application performance and a distributed data store performance, and stores a data store performance model indicating a correspondence relationship between the hardware resource amount and data store performance of the distributed data store; and a CPU. The CPU is configured to: receive target performance information by the application; determine a required performance which is a distributed data store performance required for achieving a performance to be specified by the target performance information based on the application performance model; determine a hardware resource amount required for achieving the required performance based on the data store performance model; and set the determined resource amount to be allocated to the distributed data store.