Moinak Ghosh
3aa33f5b94
Minor fix for adapt mode.
2012-11-04 21:46:04 +05:30
Moinak Ghosh
f0c7ba87a3
Use Libbsc for XML data in adapt2 mode.
2012-11-04 21:13:26 +05:30
Moinak Ghosh
ddda9e5320
Bump version to 0.9.1
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Update Changelog.
2012-10-24 18:46:27 +05:30
Moinak Ghosh
c5ebe1f30a
Portability to Debian based distros.
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Enable SSE4/AVX detection for AMD platforms (Bulldozer has both).
Portable long long int print formatting to silence gcc 4.6 warnings.
2012-10-21 21:03:07 +05:30
Moinak Ghosh
45487469d1
Add another example invocation.
2012-10-21 12:34:34 +05:30
Moinak Ghosh
189d32ea52
Bump version to 0.9.0.
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Update Changelog.
2012-10-20 23:10:05 +05:30
Moinak Ghosh
315bb50264
Change chunk HMAC to only check header, not full data. Digest in hdr int turn validates data.
2012-10-19 21:51:27 +05:30
Moinak Ghosh
1eb8c94fed
Implement HMAC verification for chunk data and header.
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Do not ask for decryption passwd twice.
2012-10-18 22:55:41 +05:30
Moinak Ghosh
d13aad830e
Implement HMAC Functionality.
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Refactor crypto utility functions in a separate file.
Add HMAC verification for file header.
Add a few extra input validation checks.
Include space in chunk header for HMAC.
2012-10-17 23:32:35 +05:30
Moinak Ghosh
f2d7bea902
Support for chunk-level encryption using AES and Scrypt based PBE.
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Couple of minor fixes.
2012-10-15 12:10:00 +05:30
Moinak Ghosh
21cbef6d60
Incorporate SSE/AVX optimized Intel SHA-256 implementation.
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Add support for runtime cpuid detection.
2012-10-06 20:51:23 +05:30
Moinak Ghosh
c880b73d26
Fix typo.
2012-10-03 22:47:16 +05:30
Moinak Ghosh
2578676b1b
Add support for SHA256 and SHA512 digests from OpenSSL library.
2012-10-03 22:43:02 +05:30
Moinak Ghosh
3492949aff
Bump version to 0.8.6
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Update Changelog
2012-10-02 10:24:32 +05:30
Moinak Ghosh
9475ccc3d6
Fix polynomial computation.
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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.
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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
d94be4e314
Update Changelog and bump version to 0.8.5.
2012-09-27 23:16:13 +05:30
Moinak Ghosh
8f8af7ed6b
Update adaptive mode heuristic based on algorithms.
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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.
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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.
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Tweak debug message for clarity.
2012-09-25 23:24:33 +05:30
Moinak Ghosh
3544a8c708
Fix polynomial table computation.
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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.
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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.
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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.
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More refactoring of symbol names.
2012-09-16 11:12:58 +05:30
Moinak Ghosh
b9355a5dcc
Reduce dedupe loop checks for slight speed edge.
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Beginnings of Fixed-block dedupe.
Update variable name for clarity.
2012-09-15 11:14:58 +05:30
Moinak Ghosh
a6b3719d89
Fix conditional in heapq function.
2012-09-11 21:59:08 +05:30
Moinak Ghosh
f3f472b860
Implement K-min-values Sketch for Similarity detection.
2012-09-11 20:26:36 +05:30
Moinak Ghosh
117382c141
Update README to reflect current features.
2012-09-07 21:32:20 +05:30
Moinak Ghosh
05a010a9dd
Bump version to 0.8.1
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Update Changelog for 0.8.1 release.
2012-09-07 19:38:36 +05:30
Moinak Ghosh
fb0aef0bd6
Fix return code handling in LZP pre-compression, crashed adaptive modes.
2012-09-07 19:31:35 +05:30
Moinak Ghosh
e6f042aaf8
Allow user-specified minimum Dedupe block size.
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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.
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Fix missing initialization of character counts table.
Some file reorganization.
2012-09-02 20:40:32 +05:30
Moinak Ghosh
4ba840b255
Add ASM version of Skein for x64 platforms with auto-detection
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Error checking for checksum flag when decompressing
Update comments and READMEs
2012-09-01 14:40:15 +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
f03834278a
Bump version to 0.8.
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Update Changelog for 0.8 beta release.
2012-08-27 22:53:39 +05:30
Moinak Ghosh
a222772940
Fix single chunk flag handling during decompression.
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Update docs.
2012-08-27 22:24:23 +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
3b83bc2d4e
Bump file version.
2012-08-26 15:01:18 +05:30
Moinak Ghosh
5f41057f9c
Add config script to generate Makefile based on flags.
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Add install target and installation readme file.
A few comment changes.
2012-08-26 14:09:24 +05:30
Moinak Ghosh
d4e9cd0140
Improve memory efficiency when total file size < total size of chunks.
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Fix freeing of Zlib structures.
2012-08-24 20:16:21 +05:30
Moinak Ghosh
bf149e880d
Add LZP Pre-Compression support ported from libbsc.
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Add generic pre-processing wrappers for future support of other pre-processors.
Clean up computation of Rabin block sizes.
Compute Rabin scratch space accurately to avoid RAM wastage.
2012-08-23 22:58:44 +05:30
Moinak Ghosh
3851c9c6cc
Delay allocation of per-thread chunks for performance and memory efficiency.
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Avoid allocating double-buffer for single-chunk files.
Introduce lzmaMt option to indicate multithreaded LZMA.
Update README.
2012-08-18 22:00:14 +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
023dcae19a
Speed up sort comparator function.
2012-08-17 13:18:50 +05:30
Moinak Ghosh
2dadf411fa
Reduce memory consumption and improve performance in dedupe
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Re-introduce crc64 for dedup blocks to avoid wasted memcpy-s
Restructe block array to be an array of pointers allocated on demand
Fix a corner case issue when splitting chunks at a dedup boundary
2012-08-17 11:03:02 +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
3150bdbed7
Implement secondary sketch based on character counts to refine similarity checksum.
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Proper checksum update for last block.
Update comments.
2012-08-12 13:06:49 +05:30
Moinak Ghosh
7b7007d6c5
Update version to 0.7 (0.6 was alpha).
2012-08-10 11:01:42 +05:30