International Business Machines Corporation
MITIGATION OF PERFORMANCE IMPACTS OF STORAGE POWER CONTROL

Abstract:

A set of read operations and a set of write operations for a set of drives in a storage system during a first time window is monitored. A write intensity of a first drive in the set is calculated based on the monitoring. The first drive is classified as a candidate for power reduction based on the write intensity. A write-intensive extent is identified on the first drive based on the monitoring. The write extensive extent is migrated to a second drive in the set of drives, and power to the first drive is reduced.