search for: lz4hc

...f you''re using experimental compression that isn''t in mainline kernels, be prepared to backup and restore or decompress before upgrading, and have backups in case it eats data (which appears not to be a problem any more, but has been during development). These patches add lz4 and lz4hc compression (https://code.google.com/p/lz4/) to btrfs. Compression with lz4 is about the same in throughput and compression ratio as lzo, but decompression is a good deal faster. In practice, this implementation also compresses faster and better than lzo because the existing lzo implementation brea...

I''ve been working on running down intermittent ENOSPC issues. I can only seem to replicate ENOSPC errors when running zlib compression. However, I have been seeing similar ENOSPC errors to a lesser extent when playing with the LZ4HC patches. I apologize for not following up on this sooner, but I had drifted away from using zlib, and didn''t notice there was still an issue. My test case involves un-archiving linux git sources to a freshly formatted btrfs partition, mounted with compress-force=zlib. I am using a 16 GB...

...265.83 MB/s, ratio 0.68 1153.17 MB/s, ratio 1.01 lzo1x_999: 92.66 MB/s, ratio 0.01 22.01 MB/s, ratio 0.52 17.39 MB/s, ratio 0.59 21.94 MB/s, ratio 1.01 lz4: 1959.64 MB/s, ratio 0.01 259.62 MB/s, ratio 0.61 241.18 MB/s, ratio 0.69 737.30 MB/s, ratio 1.00 lz4hc: 91.20 MB/s, ratio 0.01 50.70 MB/s, ratio 0.58 53.35 MB/s, ratio 0.66 61.54 MB/s, ratio 1.00 ------------------------------------------------------------------------------------------------------------------------- Packet size 8951: Algorithm Zero bytes...

Greetings, I got the below dmesg and the first bad commit is commit cf39c8e5352b4fb9efedfe7e9acb566a85ed847c Merge: 3398d25 23b7eaf Author: Linus Torvalds <torvalds@linux-foundation.org> Date: Wed Sep 4 17:45:39 2013 -0700 Merge tag ''stable/for-linus-3.12-rc0-tag'' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull Xen updates from Konrad