Patent ID: 9098424
Filing Date: 2015-08-04
Classification: G06F

Abstract:
1. A method for improving hash index key lookup caching performance in a computing environment by a processor, comprising: for a cached fingerprint map having a plurality of entries corresponding to a plurality of data fingerprints used by a data deduplication system, using reference count information obtained from a data deduplication engine to determine a length of time to retain the plurality of entries of the fingerprint map in cache, by: if the reference count information for a data segment has not been incremented or if the predetermined time interval has not expired, reiterating the step of querying; if the reference count information for a data segment has been incremented or if the predetermined time interval has expired in which no physical activity has been observed on a physical block, re-determining a new appropriate duration of retention in the cache; and when the cache is full, retaining in the cache the plurality of entries of the fingerprint map having higher reference counts and removing from the cache the plurality of entries of the fingerprint map having lower reference counts.