Moinak Ghosh
9475ccc3d6
Fix polynomial computation.
...
Fix incorrect block length when doing fixed-block dedupe.
2012-10-02 00:20:44 +05:30
Moinak Ghosh
0019efbadb
Adjust break pattern check mask for closer approximation to average block size.
...
Remove unused structure member.
2012-09-29 23:31:45 +05:30
Moinak Ghosh
24e6f4e629
Switch to multiplicative rolling hash for good distribution properties.
2012-09-29 00:09:49 +05:30
Moinak Ghosh
8f8af7ed6b
Update adaptive mode heuristic based on algorithms.
...
Remove incorrect check in PPMd decompression code.
More refactoring of variable names.
2012-09-27 22:29:08 +05:30
Moinak Ghosh
449dc35675
Speed up adaptive modes by using heuristics to select compression algorithm.
...
Select similarity percentage based on dedupe block size for effectiveness.
2012-09-26 19:47:32 +05:30
Moinak Ghosh
333b7b011e
Fix check for size reduction in dedupe.
...
Tweak debug message for clarity.
2012-09-25 23:24:33 +05:30
Moinak Ghosh
3544a8c708
Fix polynomial table computation.
...
Change hashing and length bias to reduce hashtable bucket collisions.
Add support for user-selectable 60% or 40% similarity for Delta Compression.
Overall slight speedup.
2012-09-24 22:20:27 +05:30
Moinak Ghosh
8386e72566
Rewrite core dedupe logic to simplify code and improve performance.
...
Hashtable based chunk-level deduplication instead of Quicksort.
Fix a corner case bug in Dedupe decompression.
2012-09-23 14:57:09 +05:30
Moinak Ghosh
99a8e4cd98
Speed up Hash computation for dedupe blocks.
...
Add missing initialization of sliding window.
Update help text.
2012-09-19 20:29:44 +05:30
Moinak Ghosh
e3befd9e16
Add support for Fixed-Block deduplication.
...
More refactoring of symbol names.
2012-09-16 11:12:58 +05:30
Moinak Ghosh
b9355a5dcc
Reduce dedupe loop checks for slight speed edge.
...
Beginnings of Fixed-block dedupe.
Update variable name for clarity.
2012-09-15 11:14:58 +05:30
Moinak Ghosh
f3f472b860
Implement K-min-values Sketch for Similarity detection.
2012-09-11 20:26:36 +05:30
Moinak Ghosh
e6f042aaf8
Allow user-specified minimum Dedupe block size.
...
Compute similarity sketch only if Delta Compression enabled.
2012-09-05 22:43:54 +05:30
Moinak Ghosh
560fa85aab
Fix secondary sketch computation, some more accuracy in diff detection.
2012-09-04 23:28:02 +05:30
Moinak Ghosh
262566b59a
Add xxHash for Rabin block checksums, slightly faster than CRC64.
...
Fix missing initialization of character counts table.
Some file reorganization.
2012-09-02 20:40:32 +05:30
