Adaptive data insertion for caching

摘要

A computer system cache monitors the effectiveness of data inserted into a cache by one or more sources to determine which source should receive preferential treatment when updating the cache. The cache may be part of a computer system that includes a plurality of host systems, each host system includes a host cache, connected to a storage system having a storage system cache. Ghost caches are used to record hits from the plurality of host systems performing operations for storing and retrieving data from the storage system cache. The storage system cache includes a cache controller that is operable to calculate a merit figure and determine an insertion point in a queue associated with the storage system cache based on the merit figure. The merit figure is calculated using a weighting algorithm for weighting hits from the plurality of sources recorded in the ghost caches.