INFORMATION STORAGE SYSTEM AND METHOD OF CONTROLLING INFORMATION STORAGE SYSTEM

摘要

An example of an information storage system includes physical storage drives for providing real storage areas to a pool which is tiered into tiers different in performance, and a controller. The controller monitors accesses in a first tier in the pool. The controller determines a loaded state of the first tier based on the accesses to the first tier. The controller holds management information relating loads to the first tier to relocation speeds and/or modes of moving data in data relocation between a second tier in the pool and the first tier. The controller determines at least one of a relocation speed and a mode of moving data in data relocation between the second tier and the first tier based on the determined loaded state of the first tier and the management information.

主权项

1. A storage system comprising:
a plurality of physical storage drives different in performance for providing real storage areas to a pool which is tiered into a plurality of tiers different in performance; and a controller configured to monitor a loaded state of each of the plurality of tiers in the pool, and determine a mode of moving data in data relocation between tiers based on a monitored loaded state of at least one tier.