Storage system coupled to a host computer and a management device

摘要

When a plurality of applications operating in a host computer or a storage system uses a same pool, actual data constantly allocated to an upper tier drive satisfying the required response performance will continue to increase. Therefore, when data is migrated by IOPS in page units, the access performance such as the response speed may not be satisfied. Therefore, according to the present invention, multiple virtual volumes used in applications are subjected to grouping. Relocation conditions corresponding to performances required for each group are set in advance, and reallocation of tiers according to the relocation conditions is performed.

主权项

1. A storage system coupled to a host computer and a management device,
the storage system comprising; a plurality of storage devices constituting a plurality of volumes, each of the volumes having a plurality of pool pages and belonging to one of a plurality of tiers based on a response performance; and a storage control unit for controlling the storage system configured to provide a plurality of virtual volumes having a plurality of virtual pages to the host computer, and to allocate the pool page to the virtual page when the virtual page is first used, wherein the storage control unit constructs one or more tiering groups, each of the tiering groups including one or more of the virtual volumes, sets a relocation condition to each of the tiering groups, the relocation condition including a minimum amount of use of each of the tiers, and
for each of the tiering groups, migrates the virtual pages in the virtual volumes belonging to the tiering group to an uppermost tier of the plurality of tiers until an amount of the pool pages of the uppermost tier allocated to the virtual volumes belonging to the tiering group reaches the minimum amount of use of the uppermost tier.