Delta debs / zsync (etc) discussions gone quiet?

Lars Wirzenius lars at
Tue Aug 11 06:08:36 UTC 2009

ti, 2009-08-11 kello 04:39 +0530, Vishal Rao kirjoitti:
> There was recently some mailing list activity about benchmarking tests
> for
> delta debs/zsync etc but things seem to have gone quiet recently. Is
> there a wiki/spec/blueprint or another mailing list where I can track
> progress?

The spec is at but doesn't
change much.

The summary of my conclusions:

* zsync works very well for ISO images (for testers)
* zsync works very well for Packages files
* debdelta works well for .deb files

The ISO images are now having .zsync files generated. This is useful to
reduce the time to do ISO testing cycles during beta and release
candidate testing. Testers need to update their images often. It is not
useful for end-users, who merely need to get the final version;
bittorrent is better for that.

The Launchpad developers will try to implement generation of
Packages.zsync and debdeltas for the karmic release, and I will try to
get the corresponding apt changes done as well. However, since I have
little C++ skill and no experience with the apt code base, this might
not make it for the actual release. If not, then I'll provide a PPA with
the modifications.

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