System, method and computer-readable medium for managing a cache store to achieve improved cache ramp-up across system reboots

摘要

A cache controller having a cache store and associated with a storage system maintains information stored in the cache store across a reboot of the cache controller. The cache controller communicates with a host computer system and a data storage system. The cache controller partitions the cache memory to include a metadata portion and log portion. A separate portion is used for cached data elements. The cache controller maintains a copy of the metadata in a separate memory accessible to the host computer system. Data is written to the cache store hen the metadata log reaches its capacity. Upon a reboot, metadata is copied back to the host computer system and the metadata log is traversed to copy additional changes in the cache that have not been saved to the data storage system.