greg/pcompress
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
287 commits 3 branches 21 tags 7.6 MiB
Commit graph

287 commits

This branch
This branch
All branches
Author SHA1 Message Date
Moinak Ghosh
2e62be3c9c Truncate password file after zeroing. 2013-08-29 22:03:08 +05:30
Moinak Ghosh
9a7a8e84fe Add more example usage. 2013-08-28 21:01:25 +05:30
Moinak Ghosh
be1d0857a6 Avoid calling compression routine when dedupe reduces data size to zero. 2013-08-28 09:46:10 +05:30
Moinak Ghosh
cee8d88ded Bump version for upcoming release. 2013-08-27 21:41:16 +05:30
Moinak Ghosh
7685adefb2 Default compression level only when compressing. 2013-08-24 23:15:07 +05:30
Moinak Ghosh
fc65111bae Fix issue #11. 
Increase default chunk size to 8MB.
Use default compression level of 1 (fast mode) for LZ4.
 2013-08-24 22:58:50 +05:30
Moinak Ghosh
3db5188445 Support for deduplication using 2KB block size. 2013-08-19 13:38:52 +05:30
Moinak Ghosh
ef98422bd4 Add basic file format documentation. 
Reduce memory threshold for switching to Similarity based Deduplication.
 2013-08-18 20:11:20 +05:30
Moinak Ghosh
58f3113558 Avoid unnecessary re-hashing of 64-bit keys of the segment index. 2013-08-17 22:08:55 +05:30
Moinak Ghosh
d31c6433c2 Update free memory computation to include cached buffers. 
Fix a potential rare corner case.
 2013-08-17 11:31:44 +05:30
Moinak Ghosh
413a2a2fb1 Update Changelog and bump version for 2.3 release. 2013-08-10 10:25:41 +05:30
Moinak Ghosh
f35d0ff4ef Fix multiple crashes for some corner cases. 
Increase max block size for variable dedup block sizes greater than 16KB.
Update test cases and fix a test script bug.
 2013-08-09 21:55:06 +05:30
Moinak Ghosh
fe18afbcf4 Use wrapper script to set paths when launching pcompress from build directory. 
Use smaller max block size when doing global dedupe.
Fix init of executable name.
 2013-08-07 22:03:52 +05:30
Moinak Ghosh
f34cfb1aa6 Make data partitioning between threads more effective. 
Remove unnecessary computation to make Fixed block chunking faster.
 2013-07-21 09:31:59 +05:30
Moinak Ghosh
2a218e9da5 Fix Dedupe Mode initialization. 2013-07-12 18:21:49 +05:30
Moinak Ghosh
8b73303488 Some minor code cleanup. 2013-07-05 22:22:11 +05:30
Moinak Ghosh
e10a13ad94 Improve accuracy of the KMV sketch computation and speed it up. 2013-07-03 19:24:06 +05:30
Moinak Ghosh
6b67e98747 Reduce similarity indicators to reduce memory use with low impact on dedupe ratio. 2013-06-30 22:38:05 +05:30
Moinak Ghosh
de0695e2c5 Add missing init of rabin block size. 2013-06-29 19:13:22 +05:30
Moinak Ghosh
17db67564d Reduce a rollign hash parameter for a slight speedup with no side effect. 2013-06-24 21:13:32 +05:30
Moinak Ghosh
6432c76b4b Update README formatting yet again - ugh. 2013-06-16 21:12:04 +05:30
Moinak Ghosh
52723cbbac Update README formatting. 2013-06-16 21:09:04 +05:30
Moinak Ghosh
92be5a17f0 Update README with pointers to relevant analysis and documentation. 2013-06-16 20:46:17 +05:30
Moinak Ghosh
c0dd0102a5 A few minor fixes. 2013-06-14 22:25:01 +05:30
Moinak Ghosh
63370caee9 Remove an rpath entry meant for testing. 2013-06-03 21:28:20 +05:30
Moinak Ghosh
7743792018 Make default symbol visibility to hidden with explicit public visibility specified. 
Add missing static scope to a few more places.
 2013-06-03 20:51:00 +05:30
Moinak Ghosh
c859cf35d5 Make Pcompress functionality into a library - initial changes. 2013-06-02 20:54:33 +05:30
Moinak Ghosh
8db0bef184 Bump version and update Changelog for 2.2 release. 2013-05-28 21:45:19 +05:30
Moinak Ghosh
ab1ced942d Update invalid environment variable handling to actually fail rather than auto-correct. 2013-05-28 21:38:35 +05:30
Moinak Ghosh
e9ce7a5ed2 Fix a crash with invalid PCOMPRESS_CHUNK_HASH_GLOBAL. 
Update testcase to correctly detect core files.
 2013-05-26 23:38:10 +05:30
Moinak Ghosh
ddaa3b6b6d Drastic simplification of Min-heap code and resultant Delta speedup. 2013-05-25 17:34:38 +05:30
Moinak Ghosh
0a1e3b39ef Correspond segment size to chunk size for Segmented Dedupe for better accuracy. 2013-05-15 22:20:45 +05:30
Moinak Ghosh
d89c95225a Add a testcase for issue #10. 2013-05-12 14:19:26 +05:30
Moinak Ghosh
cbc0c84b12 Fix issue #10. 2013-05-12 11:54:40 +05:30
Moinak Ghosh
41b036adac Fix issue #8. 2013-05-10 19:51:24 +05:30
Moinak Ghosh
8b3761ee81 Update Changelog, docs and bump version for 2.1 release. 2013-05-09 18:53:11 +05:30
Moinak Ghosh
a755d59dff Add more tests covering Segmented Global Dedupe. 
Fix some tests.
 2013-05-07 22:30:36 +05:30
Moinak Ghosh
2740a00c76 Switch location of Dedupe context creation to allow correct index memory sizing. 2013-05-07 20:50:13 +05:30
Moinak Ghosh
969e242b31 Update README with details of Global Dedupe block hash selection. 2013-05-06 23:50:56 +05:30
Moinak Ghosh
c27317d7da Add SSE2 optimizations for Segmented Dedupe. 2013-05-05 23:34:26 +05:30
Moinak Ghosh
6ecc400571 Fix segment offset sorting. 
Get rid of incorrect duplicate checks in index.
 2013-05-05 18:50:52 +05:30
Moinak Ghosh
c6da2325e3 Allow SKEIN to be used as a Global Dedupe chunk lookup hash. 2013-05-04 15:59:29 +05:30
Moinak Ghosh
0cf94c308a Add a qsort variant optimized for integers and use in global dedupe. 
Cleanup LZMA CRC64/32 declarations and add a header.
Fix heapq header.
 2013-05-03 22:06:55 +05:30
Moinak Ghosh
c43e99f422 Use openmp parallelism always for chunk hash computation during Global Dedupe. 2013-05-02 23:24:43 +05:30
Moinak Ghosh
120877348c Use SHA256 for Global Dedupe chunk lookup hash by default. 
Allow changing Global Dedupe chunk lookup hash via env variable.
 2013-05-02 00:05:05 +05:30
Moinak Ghosh
6e4d45b644 Fix crash with some older GCC versions. Reported in issue #7. 2013-05-01 19:27:43 +05:30
Moinak Ghosh
eae16b82d3 Fix issue #7. 
Ensure tempfile cleanup even with error abort.
 2013-05-01 18:01:17 +05:30
Moinak Ghosh
b23b5789fb Fix bugs and improve accuracy in Segmented Dedupe. 
Fix segment hashlist size computation.
Remove unnecessary sync of segment hashlist file writes.
Pass correct number of threads to index creation routine.
Add more error checks.
Handle correct positioning of segment hashlist file offset on write error.
Add missing semaphore signaling at dedupe abort points with global dedupe.
Use closer min-values sampling for improved segmented dedupe accuracy.
Update proper checksum info in README.
 2013-04-30 19:35:18 +05:30
Moinak Ghosh
074e265f70 Fix sizing of similarity hash buffer. 2013-04-26 22:36:14 +05:30
Moinak Ghosh
2f2fc23771 Tweak index size computation. 2013-04-26 19:21:11 +05:30