Using zsync for .deb downloads: initial benchmark results

[Matthew Paul Thomas]

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Paul Sladen wrote on 15/07/09 01:37:
>...
> Three years ago, zsync fitted on the time/disk-space curve very well
> and represented an excellent opportunity for a clever optimisation
> without burning diskspace.  With the increased deployment of
> LZMA/Bzip2 my personal humble opinion is that zsync-style methods
> applied *only* for Packages.gz make sense and instead to focus on
> bsdiff-based delta-diffs for the .deb packages themselves.  Diskspace
> is now cheaper than bandwidth (particularly the type over GPRS) and
> the issue of the mirror growing 20% to store those deltadebs is not a
> problem.
>...

The Chromium developers have replaced bsdiff with a more efficient
algorithm called "Courgette" to download and install Chromium updates.
<http://dev.chromium.org/developers/design-documents/software-updates-courgette>


- --
Matthew Paul Thomas
http://mpt.net.nz/
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