Patent ID: 8589624
Filing Date: 2013-11-19
Classification: G06F

Abstract:
1. A method for background destaging storage tracks from a write cache configured to store a plurality of storage tracks when at least one host is idle, the method comprising: monitoring, by a processor coupled to the write cache, the write cache for write operations from the at least one host; determining if the at least one host is idle based on monitoring the write cache for write operations from the at least one host; destaging storage tracks from the write cache if the at least one host is idle; and refraining from destaging storage tracks from the write cache if the at least one host is not idle, wherein the write cache is partitioned into a plurality ranks each comprising a portion of the plurality of storage tracks, the method further comprising: monitoring each rank for write operations from the at least one host; and determining if the at least one host is idle with respect to each respective rank based on monitoring each rank for write operations from the at least one host such that the at least one host may be determined to be idle with respect to a first rank and not idle with respect to a second rank.