Patent ID: 8122116
Filing Date: 2012-02-21
Classification: G06F

Abstract:
1. A storage management method in a computer system wherein the computer system has a virtual machine running on a physical server and a storage device and also a management server that manages a relation between the virtual machine and the physical server and a relation between the virtual machine and the storage device; wherein the management server stores in a memory unit thereof allowable input/output information on an allowable input/output data volume of a memory device in the storage device; wherein, when the management server moves the virtual machine from the physical server on which the virtual machine is currently mounted to another preselected physical server through an input unit, the management server: retrieves device information about the virtual machine to be moved, based on the retrieved device information, calculates an estimated input/output data volume, which is an estimated input/output data volume in the virtual machine to be moved, if the calculated estimated input/output data volume is greater than an allowable input/output data volume in the memory device accessible to the virtual machine, searches for another device whose estimated input/output data volume is less than the allowable input/output data volume, relates the searched memory device with the virtual machine to be moved, moves the virtual machine to be moved to the other physical server, and wherein the memory unit stores past device information and past input/output data volumes of the virtual machine to be moved; wherein the management server: retrieves a time when the past device information in the physical server executing the virtual machine to be moved before being moved is not in excess of a device performance limit value of the device information, retrieves the past input/output data volumes in the retrieved time, calculates a relation equation between the retrieved past input/output data volumes and the time, calculates input/output data volumes in a predetermined time, based on the relation equation, and sets the calculated input/output data volumes as the estimated input/output data volumes.