Deduplicating data blocks in a storage system
US9256378B2 · kind B2 · utility
10Cited by
10References
21Claims
0Family size
Assignee
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Key dates
| Filing date | May 23, 2013 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Feb 13, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0683
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for sharing data blocks in a hierarchical file system in a storage server includes allocating a plurality of data blocks in the file system, and sharing data blocks in the file system, without using a persistent point-in-time image, to avoid duplication of data blocks. A method for identifying data blocks that can be shared includes computing a fingerprint for each of multiple data blocks to be written to a storage facility and storing the fingerprint with information identifying the data block in an entry in a set of metadata. The set of metadata is used to identify data blocks which are duplicates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.