Adaptive record caching for solid state disks

摘要

A storage controller receives a request that corresponds to an access of a track. A determination is made as to whether the track corresponds to data stored in a solid state disk. Record staging to a cache from the solid state disk is performed, 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.

主权项

1. A system, comprising:
a memory; and a processor coupled to the memory, wherein the processor performs operations, the operations comprising: receiving 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, the operations further comprising: maintaining a least recently used list for tracks, wherein each track in the list is numbered sequentially in a monotonically increasing order as each track is accessed in the cache and then placed in the least recently used list; and determining whether a selected track has been used recently based on a predetermined criterion that is based on sequence numbers of tracks in the 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.