| 摘要 |
A storage system manages a pool to which multiple VVOLs (virtual logical volumes conforming to thin provisioning) are associated, assigns a real area (RA) from any tier in an available tier pattern associated with a write-destination VVOL to a write-destination virtual area (VA), and carries out a reassignment process for migrating data inside this RA to an RA of a different tier than the tier having this RA based on the access status of the RA assigned to the VA. A management system assumes that a specified tier has been removed from the available tier pattern of a target VVOL, predicts the performance of the target VVOL and all the other VVOL associated with the pool to which the target VVOL is associated, determines whether or not there is a VVOL for which the predicted performance is lower than a required performance, and when such a VVOL does not exist, instructs the storage system to remove the specified tier from the available tier pattern of the target VVOL. |
| 主权项 |
1. A management computer coupled to a host computer and a storage system,
wherein the storage system comprises:
a plurality of storage media which differ from each other in performance and are categorized into a plurality of tiers by I/O performance;configuration management information which includes an identifier (ID) of a virtual volume, an ID of a pool, an ID of a storage medium of the plurality of storage media, an ID of a page, an ID of an available tier, and an I/O performance; andtier management information which includes the ID of the storage medium, an ID of a tier of the plurality of tiers, and a limit of I/O performance; and is configured to:
make the pool from the plurality of storage media;associate the virtual volume with the pool;provide the virtual volume to the host computer; andreassign data among, the plurality of tiers by the page by referring to the configuration management information and the tier management information to make the I/O performance of reassigned data meet a required I/O performance, wherein the management computer comprises virtual volume management information which includes the ID of the virtual volume, the required I/O performance, and the ID of the available tier, and is configured to:
when there is a first specified virtual volume which does not meet the required I/O performance and is a target for resetting, change the available tier of the first specified virtual volume to meet the required performance;check whether there is another virtual volume which does not meet the required I/O performance in consequence of the change of the first specified virtual volume; andwhen there is another virtual volume which does not meet the required I/O performance, change the available tier of the another virtual volume to meet the required I/O performance. |
