International Business Machines Corporation
Using storage access statistics to determine mirrored extents to migrate from a primary storage system and a secondary storage system to a third storage system

Abstract:

Provided are a computer program product, system, and method for using storage access statistics to determine mirrored extents to migrate from a primary storage system and a secondary storage system to a third storage system. A determination is made of access statistics with respect to mirrored extents of data at the primary storage mirrored to the secondary storage to migrate to the third storage. A first set of the mirrored extents associated with access statistics indicating a highest level of access of the mirrored extents are migrated from the secondary storage to the third storage. A second set of the mirrored extents associated with access statistics indicating a lower level of access than the mirrored extents in the first set are migrated from the primary storage to the third storage.