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by Leandro Lucarella on 2009- 10- 11 19:56 (updated on 2009- 10- 11 19:56)
tagged backup, data deduplication, en, fs, lessfs, linux - with 0 comment(s)

Lessfs is an open source data deduplication filesystem:

Data deduplication (often called "intelligent compression" or "single-instance storage") is a method of reducing storage needs by eliminating redundant data. [...] lessfs can determine if data is redundant by calculating an unique (192 bit) tiger hash of each block of data that is written. When lessfs has determined that a block of data needs to be stored it first compresses the block with LZO or QUICKLZ compression. The combination of these two techniques results in a very high overall compression rate for many types of data.