On 2013-05-21, Allen Supynuk <allen.supy...@gmail.com> wrote: > I have been doing some experiments with rsync on btrfs, a > copy-on-write file system that is approaching or having just achieved > production-ready status depending on your requirements.
<snip> > ## 6) Use rsync --inplace to make a copy of the first file. > ## Note: > ## - We use --inplace to copy over the existing file > ## - We do not use -W aka --whole-file so the delta-xfer algorithm > should be in play > ## - The hope is that rsync will only rewrite the first block of the file > > $ time > /usr/share/sbtools-sbjobarchive/external-apps/rsync/rsync-3.0.9/install/centos5-64/bin/rsync > --stats -az --timeout=600 --inplace src/ current/ > > Number of files: 2 > Number of files transferred: 1 > Total file size: 10737418240 bytes > Total transferred file size: 10737418240 bytes > Literal data: 10737418240 bytes > Matched data: 0 bytes > File list size: 52 > File list generation time: 0.001 seconds > File list transfer time: 0.000 seconds > Total bytes sent: 10742659175 > Total bytes received: 34 > > sent 10742659175 bytes received 34 bytes 11012464.59 bytes/sec > total size is 10737418240 speedup is 1.00 > 851.783u 79.265s 16:14.78 95.5% 0+0k 19752416+20971520io 17pf+0w > > ## 7) Alas the new file takes up a full extra 10 GB. You're testing --whole-file: that's the default with source and destination as local paths. You want --no-whole-file in there. Cheers, Chris -- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
