Patent ID: 8825938
Filing Date: 2014-09-02
Classification: G06F

Abstract:
1. A method comprising: determining a size of a quorum to be used when writing data to a storage subsystem that includes a plurality of solid-state storage devices, wherein the quorum is defined to include at least two of the plurality of solid-state storage devices, and wherein a plurality of quorums of said size can be defined from among the plurality of solid-state storage devices; making write allocation decisions for the storage subsystem, based on a write history and a replacement history of the plurality of solid-state storage devices, to implement a desired wear policy on the plurality of solid-state storage devices, wherein said making writing allocation decisions includes using fewer than all of the quorums of said size from among the plurality of solid-state storage devices, to cause two or more of the solid-state storage devices to have different-sized write workloads, but still using each of the plurality of solid-state storage devices for writing data; and storing data in the storage subsystem according to the write allocation decisions.