Patent ID: 8359440

Claim:
A computer system, comprising: a plurality of physical server devices, each of which is configured to provide a virtual server device; a plurality of physical storage devices, which are coupled to the plurality of physical server devices and each of which is configured to provide a virtual storage device; and a management server device, which is coupled to the plurality of physical storage devices and is configured to retain first configuration information relating to a plurality of first virtual server devices included in a first virtual system and disposed in at least one of the plurality of physical server devices and relating to a first virtual storage device included in the first virtual system and disposed in one of the plurality of physical storage devices, second configuration information relating to a plurality of second virtual server devices included in a second virtual system and disposed in at least one of the plurality of physical server devices and relating to a second virtual storage device included in the second virtual system and disposed in one of the plurality of physical storage devices, and third configuration information relating to a plurality of third virtual server devices included in a third virtual system and disposed in at least one of the plurality of physical server devices and to a third virtual storage device included in the third virtual system and disposed in any of the plurality of physical storage devices, wherein the management is configured migrate at least one of the plurality of first virtual server devices to another physical server device by: calculating a first evaluation value by comparing at least one candidate physical server device in which the plurality of first virtual server devices are disposed with at least one candidate physical server device in which the plurality of second virtual server devices are disposed, based on the first configuration information and the second configuration information, and calculating a second evaluation value by comparing at least one candidate physical server device in which the plurality of first virtual server devices are disposed, with at least one candidate physical server device in which the plurality of third virtual server devices are disposed, based on the first configuration information and the third configuration information, and wherein the management server device is configured to instruct the plurality of physical storage devices to migrate the first virtual storage device to another physical storage device, on the basis of the first evaluation value and the second evaluation value.