Patent ID: 8683162
Filing Date: 2014-03-25
Classification: G06F

Abstract:
1. A computer system comprising: a storage system; and a management system coupled to the storage system via a network and configured to manage the storage system, wherein the storage system includes a plurality of pools each of which includes a plurality of storage resources and is separated into a plurality of tiers different in access performance; wherein the management system monitors access performance of the plurality of pools to detect a risky pool which is expected to become unable to satisfy predetermined access performance requirements; wherein the management system estimates access performance of each of one or more candidate pools in the plurality of pools in a case where a storage resource thereof migrates to the risky pool, by simulation based on variations in data arrangement in the pool caused by evacuating data held in the storage resource in the same pool for the migration of the storage resource; and wherein the management system determines that the storage resource migrates from a source pool of which the estimated access performance satisfies predetermined performance requirements to the risky pool.