Patent ID: 7809905
Filing Date: 2010-10-05
Classification: G06F

Abstract:
1. A computer system, comprising: a storage system; a host computer that is coupled to the storage system via a network; and a storage management server that can access to the storage system and the host computer, wherein the storage system comprises a first interface that is coupled to the network, a first processor that is coupled to the first interface, a first memory that is coupled to the first processor, and a storage device that stores data that is read or written by the host computer, and provides at least one storage area of the storage device for the host computer as at least one volume, wherein the storage management server comprises a second interface that is coupled to the storage system, a second processor that is coupled to the second interface, and a second memory that is coupled to the second processor, wherein the second memory stores configuration information of the volume, and wherein the second processor executes a volume migrating process for migrating data stored in the volume to another volume, in which the second processor: calculates a required period of time for migrating the data based on a size of data to be migrated, volume configuration information of a first volume in which the data to be migrated is stored, and volume configuration information of a second volume that is a volume to which the data is migrated; generate a volume migration plan by determining a start time at which the data migration starts based on the calculated required period of time and an input end time; sets a priority of the generated volume migration plan; and changes, in a case where a period of time during which the produced volume migration plan is executed and a period of time during which an existing volume migration plan is executed are overlapped with each other, based on a result of comparing a priority of the generated volume migration plan with a priority of the existing volume migration plan, the start time of at least one of the generated volume migration plan and the existing volume migration plan, in accordance with the priority of the volume migration plan which has a higher priority of the generated volume migration plan and the existing volume migration plan.