Patent ID: 8103826
Filing Date: 2012-01-24
Classification: G06F

Abstract:
1. A volume management method for a storage system that comprises: a plurality of host computers configured to operate an application; and a plurality of storage devices each configured to provide a volume to the application and a RAID group, each storage device storing application management information and resource management information, and wherein the application management information of each storage device includes an identifier of the application and a host performance value, and wherein the resource management information of each storage device relates a reliability value and a performance value of the RAID group, the volume management method comprising: migrating the application from a first host computer to a second host computer; judging whether a configuration of the second host computer changes; selecting a RAID group provided by the plurality of storage devices by referring to the resource management information of each storage device upon determining that the configuration of the second host computer changes; and migrating a volume associated with the migrated application from a first storage device to a second storage device that provides the selected RAID group upon selecting the RAID group.