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 through rebooting 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 a 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 when the metadata log reaches the capacity. Upon rebooting, metadata is copied back to the host computer system and the metadata log is traversed to copy additional changes in the cache which are not saved to the data storage system.