Locality aware, two-level fingerprint caching

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United States of America Patent

PATENT NO 9495379
APP PUB NO 20140101113A1
SERIAL NO

13646852

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Abstract

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The present disclosure provides for implementing a two-level fingerprint caching scheme for a client cache and a server cache. The client cache hit ratio can be improved by pre-populating the client cache with fingerprints that are relevant to the client. Relevant fingerprints include fingerprints used during a recent time period (e.g., fingerprints of segments that are included in the last full backup image and any following incremental backup images created for the client after the last full backup image), and thus are referred to as fingerprints with good temporal locality. Relevant fingerprints also include fingerprints associated with a storage container that has good spatial locality, and thus are referred to as fingerprints with good spatial locality. A pre-set threshold established for the client cache (e.g., threshold Tc) is used to determine whether a storage container (and thus fingerprints associated with the storage container) has good spatial locality.

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Patent Owner(s)

  • VERITAS TECHNOLOGIES LLC

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cheng, Shuai Beijing, CN 27 193
Lei, Chao Beijing, CN 18 117
She, Haibin Beijing, CN 11 271
Song, Xiaobing Beijing, CN 6 88
Zhang, Xianbo Plymouth, US 63 882

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