International Business Machines Corporation
Data migration across tiers in a multi-tiered storage area network

Abstract:

A storage volume functioning at least in part as cache for a tiered storage system, the storage volume having an in-memory write extent consisting of write-accessed grains retrieved from a plurality of hot extents in a first tier of the tiered storage system, where the in-memory write extent is a same size as a block erase size of a solid-state drive tier of the tiered storage system. The storage volume further having an in-memory read extent consisting of read-accessed grains retrieved from the plurality of hot extents in the first tier of the tiered storage system.