2 Tags: en, fs, lessfs, backup, data deduplication, linux
4 Lessfs_ is an open source `data deduplication`_ filesystem:
6 `Data deduplication`_ (often called "intelligent compression" or
7 "single-instance storage") is a method of reducing storage needs by
8 eliminating redundant data. [...] lessfs_ can determine if data is
9 redundant by calculating an unique (192 bit) tiger hash of each block of
10 data that is written. When lessfs_ has determined that a block of data
11 needs to be stored it first compresses the block with LZO or QUICKLZ
12 compression. The combination of these two techniques results in a very
13 high overall compression rate for many types of data.
15 .. _Lessfs: http://www.lessfs.com/wordpress/?page_id=50
16 .. _`data deduplication`: http://en.wikipedia.org/wiki/Data_deduplication
18 .. vim: set et sw=4 sts=4 :