On Fri, 11 Mar 2005, Jeff Johnson wrote: > This patch > https://svn.uhulinux.hu/packages/dev/zlib/patches/02-rsync.patch > is in rpm-4.4.1 and on by default. > > If the payloads in FC4 are not rsyncable right now, then it's because > beehive is using an > older version of rpm ... checking ... yep, current rpm payloads should > be rsync ready: > > $ rpm -q --qf '%{rpmversion}\n' perl > 4.4.1 It seems the option isn't active for FC3 and its updates (which is what I had tested) so I have repeated the test with a couple of RPMs from different rawhide mirrors using xdelta, which uses a similar algorithm to rsync, and found the following sizes libgcj-4.0.0-0.31.i386.rpm 13942525 libgcj-4.0.0-0.32.i386.rpm 13950302 xdelta of rpms 6911651 xdelta of header + cpio 3723074 thus there is a significent saving in size for small changes, though you can do even better with more processing. Also from my experience with openoffice rpm library rpms don't diff as well as other packages, so the typical saving might be better than this example. Michael Young
