David Howe wrote: > Matt McCutchen wrote: >> On Sun, 2009-02-08 at 20:28 -0600, Michael Gardner wrote: >>> Is it possible to have rsync do a transform on each file before sending >>> it? This would be useful for things like individually compressed or >>> encrypted backups, or in my case, syncing lossy copies of my FLAC music >>> to an mp3 player or laptop. >> This feature is provided by a maintained patch, which is not very >> mature: >> >> http://rsync.samba.org/ftp/rsync/patches/source-filter_dest-filter.diff >> >> Like many others, this patch is perhaps worthy but no one has shown an >> interest in working on it recently. If you are willing to improve the >> patch to the point that it meets your needs, that would be great. > > I can see this particular example being excessively cpu intensive though > - having to re-encode an entire directory of lossless files as a > different format so you can compute the hash - plus of course its > possible that some encoding processes could be non-deterministic.
Not if you use timestamps instead of hashes, which rsync does by default. You'd have to disable the filesize check, though, which is why the patch above also provides a new --times-only switch. That patch is pretty raw, though, and I don't think I have the time or inclination to work on it-- my use case is not very urgent, and I don't enjoy coding in plain C. -- 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
