Re: Proposal: Faster composes by eliminating deltarpms and using zchunked rpms instead

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On Mon, 2018-11-19 at 14:57 +0100, Miroslav Suchý wrote:
> Dne 16. 11. 18 v 23:07 Jonathan Dieter napsal(a):
> >    1. Downloading a new release of a zchunked rpm would be larger than
> >       downloading the equivalent deltarpm.  This is offset by the fact
> >       that the client is able to work out which chunks it needs no matter
> >       what the original rpm is, rather than needing a specific original
> >       rpm as deltarpm does.
> 
> Does this means bigger requirements for copies of RPMs too? I mean
> for all our repos mirros, for RH Satellites, Spacewalk, Koji, Copr,
> Retrace...

Yes, and that should actually be item 3 in drawbacks.  Zchunked rpms
will be larger than the current xz-compressed rpms, but the actual size
increase is still unknown.  I think we can shoot for roughly the same
size as a gzip-compressed rpm, but I'm not sure.

Mirror storage *might* actually go down, since we no longer need to
store deltarpms, but anything that only stores rpms will definitely
require more space.

Jonathan

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