On Mon, Jul 13, 2009 at 12:20 PM, Celejar<cele...@gmail.com> wrote: > I'm no expert in this stuff, so I'm curious - what is gained by this > over a straight rsync?
In my experience, find | cpio is faster than rsync for moving raw data around. Not sure why, but it feels that way. It's been a long time since I've done any speed tests. If I remember correctly, rsync will still use one process for reading and another for writing, so you end up reading gigs from disk, shoving gigs over pipe, writing gigs to disk. I'm not sure if that's still the case or not. The common tar cf - | tar xf - solution has the same issue. find | cpio just shoves the list of file names across the pipe, so there's nearly a third less data being moved around. Of course, all of that may be immaterial on modern machines. It may also be that find | cpio has less of the fragmentation issues that rsync does (see discussions in the week or two on this list). But that's pure guess work on my part. mrc -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
