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Re: createrepo/rpm-metadata repository format creator ver 0.3.4



On Sat, 2004-07-24 at 13:24, Sindre Pedersen Bjordal wrote:
> lør, 24.07.2004 kl. 13.01 skrev Ralf Corsepius:
> > On Fri, 2004-07-23 at 22:24, seth vidal wrote:
> > > On Fri, 2004-07-23 at 15:54 +0200, Matias Feliciano wrote:
> > > > Le ven 23/07/2004 à 07:13, seth vidal a écrit :
> > > > > [...]
> > > > > http://linux.duke.edu/metadata/generate/createrepo-0.3.4.tar.gz
> > > > > http://linux.duke.edu/metadata/generate/createrepo-0.3.4-1.src.rpm
> > > > > 
> > > > > [...]
> > > > > primary.xml.gz - this holds the primary metadata for the packages
> > > > >                  (names, summary, requires, provides, deps, etc)
> > > > 
> > > > bzip2 instead of gzip ?
> > > > apt use bzip2.
> > > > 
> > > 
> > > bzip2 is more processor intensive
> > apt uses bzip2 for its repositories for quite a while. The processor
> > load this had introduced had never been an actual problem. Conversely,
> > users on low bandwith connections had appreciated it.
> > 
> > Ralf
> > 
> 
> Just out of curiosity, how big a difference does bz2 make in compression

On createrepo generated *.xml files the difference in file size is ca.
factor 1.4 to 1.8

> and increase of processor load?
Noticeable, but far from being critical:

Bunzip'ing a createrepo generated repo of FC1 (>3000 entries), on a  PIII/1GHz w/ FC1:

real    0m1.587s
user    0m1.440s
sys     0m0.090s

Gunzip'ing the same repo: 
# time gunzip *gz
real    0m0.230s
user    0m0.130s
sys     0m0.050s

=> ca. factor 10.

Note, this is "~0.2s" vs. "~2s", so this difference won't hardly be
noticed by users.

Ralf




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