Patent ID: 9477606
Filing Date: 2016-10-25
CPC Classification: G06F

Claim Text:
1. A method, comprising: receiving, by a storage controller, a request that corresponds to an access of a track; determining whether the track corresponds to data stored in a solid state disk; and performing, record staging to a cache from the solid state disk, in response to determining that the track corresponds to data stored in the solid state disk, wherein each track is comprised of a plurality of records, wherein the record staging from the solid state disk is performed in response to determining that the track has not been used recently, and selecting at least among performing partial track staging and performing full track staging in response to determining that the track has been used recently, and wherein determining whether one or more tracks have been used recently is based on a predetermined criterion that is based on sequence numbers of tracks in a least recently used list for tracks, an amount of cache space consumed by those tracks that are stored in the cache, and a threshold value that indicates an amount of storage.