Patent ID: 7917722
Filing Date: 2011-03-29
Classification: G06F

Abstract:
1. A data controlling method in a computer system, the computer system including a management computer and a storage system, the storage system including real volumes and pooled volumes included in a first volume pool, the method comprising: at the management computer, storing storage information indicating capacities of the real volumes and the pooled volumes; at the management computer, receiving input for creation of a virtual volume, the input including a virtual volume capacity, an assigned capacity threshold, and a prioritized migration method identifier, and sending a virtual volume creation request, including the virtual volume capacity and the assigned capacity threshold, to the storage system; at the storage system, creating a certain virtual volume which capacity is the virtual volume capacity, and assigning an area of the pooled volumes to an unassigned address in the certain virtual volume, in response to a write access from a host computer coupled to the storage system; and at the management computer, when a capacity of the area of the pooled volumes assigned to the certain virtual volume exceeds the assigned capacity threshold, selecting a volume having a capacity that is larger than the virtual volume capacity and which is one of the real volumes and the pooled volumes, based on the storage information and the prioritized migration method identifier, and sending a migration request for the certain virtual volume to the selected volume of the storage system.