Patent ID: 9141295
Filing Date: 2015-09-22
Classification: G06F

Abstract:
1. A method within a data storage system performing data mirroring for performing load balancing pursuant to completing a read request, comprising: examining each request queue in the data storage system performing the data mirroring; determining at least one of a preferred storage controller and preferred storage device to accommodate the read request by performing one of: determining if a difference between a number of read requests in a first request queue and a number of read requests in a second request queue exceeds a predetermined threshold; selecting which of the first and second request queues having a shortest number of read requests if the difference between the number of read requests in the first request queue and the number of read requests in the second request queue exceeds the predetermined threshold; if the difference between the number of read requests in the first request queue and the number of read requests in the second request queue does not exceed the predetermined threshold;