[Rpm-ecosystem] Proposed zchunk file format

Michael Schroeder mls at suse.de
Thu Mar 1 10:12:44 UTC 2018

On Wed, Feb 28, 2018 at 09:31:39AM +0200, Jonathan Dieter wrote:
> On Fri, 2018-02-23 at 14:14 +0000, Michael Schroeder wrote:
> > This may be an unfair question, but how does it compare to the
> > 'gzip --rsyncable' + zsync approach that we (openSUSE) are
> > using since almost eight years? I guess it's better, but how much?
> Ok, here are some numbers comparing zsync and zchunk.  For testing, I
> have eight f27-updates primary.xml files dating from Dec 7 until Feb
> 12.  3-6 are on consecutive days in mid-January, while 7 and 8 are two
> days apart in mid-February.

The gzip --rsyncable + zsync approach only makes sense when the repository
metadata is ordered so that new packages come last. Did you do that in
your tests?


Michael Schroeder                                   mls at suse.de
SUSE LINUX GmbH,           GF Jeff Hawn, HRB 16746 AG Nuernberg

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