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Author SHA1 Message Date
Moinak Ghosh
eacbf207aa Tweak chunking parameters for better block size distribution and dedupe ratio. 2012-11-08 19:41:33 +05:30
Moinak Ghosh
e437390e53 Add some more debug mode info. 2012-11-07 22:55:14 +05:30
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 
Update Changelog.
 2012-10-24 18:46:27 +05:30
Moinak Ghosh
c5ebe1f30a Portability to Debian based distros. 
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. 
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. 
Do not ask for decryption passwd twice.
 2012-10-18 22:55:41 +05:30
Moinak Ghosh
d13aad830e Implement HMAC Functionality. 
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. 
Couple of minor fixes.
 2012-10-15 12:10:00 +05:30
Moinak Ghosh
21cbef6d60 Incorporate SSE/AVX optimized Intel SHA-256 implementation. 
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 
Update Changelog
 2012-10-02 10:24:32 +05:30
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
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. 
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
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 
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. 
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
Moinak Ghosh
4ba840b255 Add ASM version of Skein for x64 platforms with auto-detection 
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 
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. 
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. 
Update docs.
 2012-08-27 22:24:23 +05:30
Moinak Ghosh
d75535bc7e Add support for libbsc a high-performance block sorting compressor. 
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. 
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. 
Fix freeing of Zlib structures.
 2012-08-24 20:16:21 +05:30
Moinak Ghosh
bf149e880d Add LZP Pre-Compression support ported from libbsc. 
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. 
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 
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 
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 
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