Moinak Ghosh
262566b59a
Add xxHash for Rabin block checksums, slightly faster than CRC64.
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Fix missing initialization of character counts table.
Some file reorganization.
2012-09-02 20:40:32 +05:30
Moinak Ghosh
eda312ce1e
Add support for Skein512 and Skein256 checksums
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Import Skein code from NIST CD submission
Make checksum algorithms pluggable
Fix handling of huge buffers (>2GB) in LZP
Cleanup of some buffer sizing code
Speed up CRC64 calculation in dedupe chunking
2012-08-31 22:36:06 +05:30
Moinak Ghosh
d75535bc7e
Add support for libbsc a high-performance block sorting compressor.
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Enable external algorithm threading for single chunk compressed files.
Update docs.
2012-08-27 21:51:55 +05:30
Moinak Ghosh
9eac774eb1
Add multithreaded LZMA port from p7zip
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Compute balanced thread count between chunk threads and algo threads
Generic way to handle querying algorithm parameters
Clean up unnecessary includes
2012-08-18 10:20:52 +05:30
Moinak Ghosh
55d0485d34
Improve Rabin computations using an irreducible polynomial
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Slight improvement to similarity computation
A simple mechanism to include DEBUG mode stats
Include stdint for common int types
2012-08-15 20:13:40 +05:30
Moinak Ghosh
400d0bfa72
Bias fingerprint value with occurrence counts for a better sketch
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Fix latent bug when calling algo deinit in decompression code
Reduce diff threshold for slightly greater delta encoding
Limit similar buffer size difference for less wasted diffing
Change zlib compression wrapper to use faster deflateReset mechanism
Reduce optimization level for Dedupe code, it goes faster
2012-08-08 22:40:58 +05:30
Moinak Ghosh
7ff2cb74c4
Increase the small size slabs a bit.
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Move 64Bit integer hashing function to common file for use in other places.
2012-07-29 15:02:51 +05:30
Moinak Ghosh
94563a7ecd
Fix buffer size computation when allocating Rabin block array.
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Reduce memory usage of Rabin block array.
Add an SSE optimization for bsdiff.
Move integer hashing function to utils file.
More updates to README.
2012-07-28 23:55:24 +05:30
Moinak Ghosh
296e2ab6b2
Add support for LZ4 compression including multi-pass LZ4.
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Add missing Read_Adjusted() declaration, was causing a crash with 2GB chunks.
Fix minor cut-paste issues in comments.
2012-07-25 21:07:36 +05:30
Moinak Ghosh
e788eb43b8
Implement Delta Encoding based on modified bsdiff.
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Change to more accurate Sketch value computation approach.
2012-07-19 21:41:07 +05:30
Moinak Ghosh
a873f92e41
Fix crash when decompressing deduped archive.
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Ensure correct level is passed to lzma.
Avoid branch when wrapping rabin window position and check for rabin window size to be power of 2.
Update rabin parameters check for adaptive modes.
Add detection of 7-bit text/8-bit binary data for later use.
2012-07-10 20:14:23 +05:30
Moinak Ghosh
d3f5287ee5
Update License info to LGPLv3.
2012-07-07 22:18:29 +05:30
Moinak Ghosh
ea923b84f0
Use different min block size and Rabin break pattern depending on compression algo.
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Cleanup some cruft.
2012-07-06 23:24:12 +05:30
Moinak Ghosh
a1825a2305
Implement Parallel deduplication support.
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Restructure compression functions to take chunk flag as argument.
Add missing error flag printing in LZMA.
Only create enough threads as needed by chunk size and file size.
Minor cleanups and variable name changes.
2012-07-01 21:44:02 +05:30
Moinak Ghosh
cbf9728278
Implement Deduplication based on Rabin Fingerprinting: work in progress.
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Fix bug that prevented pipe mode from being used.
Allow building without specialized allocator.
Use basic optimize flag in debuig build.
2012-06-29 18:23:55 +05:30
Moinak Ghosh
733923cbf2
Add ability to adjust chunk boundary based on Rabin Fingerprinting to improve compression.
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Remove unnecessary checks in compression loop.
2012-06-21 20:27:05 +05:30
Moinak Ghosh
e46d3d10b3
Add basic compression statistics and new option to display them.
2012-05-31 21:36:33 +05:30
Moinak Ghosh
3cdfa86d65
Portability to Solaris and derivative platforms.
2012-05-31 18:01:34 +05:30
Moinak Ghosh
07dfed7769
Initial Commit.
2012-05-28 20:19:29 +05:30
