Peter's comments on Mifluz are very accurate.
Peter Marelas writes:
Mifluz uses zlib and some bit compression. Coupled with
sorted b+tree's it achieves 1/8th compression on-disk.
Just a little clarification on this point. Mifluz provides
two kind of compression : zlib (1/2) and custom (1/8). The first
scheme (using zlib) achieves 1/2 compression on the index and could
be used outside mifluz (patch to Berkeley DB). The second scheme
is only fit for a mifluz inverted index and since it knows the internal
structure of the key, it is able to compress to 1/8.
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