2007/3/15, Dale Ogilvie <pnyli0002@sneakemail.com>:

Hello all,

I reckon it would be great to download only diffs for new package versions instead of the whole enchilada every time a buffer overflow exploit is fixed in kernel26. Building on Thikasabrik's good work on the forum (see http://bbs.archlinux.org/viewtopic.php?id=22872) I have come up with the attached patch for makepkg.

FYI, I intend to look further into the pacman side of things next up. I hope I can make this thing work... Comments & suggestions are welcome...

Another alternatives to xdelta: 1) bsdiff - smaller patches, slower speed http://www.daemonology.net/bsdiff/ Debian's debdelta switched from xdelta to bsdiff but now looking a compromise http://packages.debian.org/unstable/devel/debdelta 2) deltup - nice wrapper for xdelta and includes builtin bdelta support http://linux01.gwdg.de/~nlissne/whatisdeltup.html http://sourceforge.net/project/showfiles.php?group_id=77305 used by Gentoo 3) zsync - rsync-like algorithm but diffs are done by client its advanced design allows it to be effective on compressed files (which are packages) too. http://zsync.moria.org.uk/ apt-sync and Succinct are based on zsync https://wiki.ubuntu.com/apt-sync https://wiki.ubuntu.com/PaulSladen/Succinct I'm currently testing zsync, which doesn't require to store deltas for each package update. -- Roman Kyrylych (Роман Кирилич)