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Re: Apt and rsync... I know...



Florian Weimer <fw@deneb.enyo.de> writes:

> Goswin von Brederlow wrote:
> 
> > > Delta sizes are:
> > > 
> > >   rdiff                        7302952
> > >   rdiff (gzip -9)              2423336
> > >   svndelta                     1793107
> > >   svndelta (gzip -9)           1539271
> > >   xdelta (-0)                  1751110
> > >   xdelta (-9)                   935281
>       rsync                        7654580
>       rsync (gzip -9)              2487882
> 
> Numbers were obtained using the experimental batch mode.  Only the delta
> file size is included.  Not surprisingly, they are quite similar to
> rdiff.
>       
> > > svndelta is quite CPU-intensive, compared to the others.  (I'm not sure
> > > if it's because of the base64 encoding, which isn't included in the
> > > numbers above.)  xdelta and rdiff use comparable amounts of CPU time
> > > (with and without compression). xdelta seems to need memory proportional
> > > to the size of the input files, which might be a problem.
> 
> xdelta needs all data in core, and is suitable for small patches only.
> 
> > And what does rsync say? Ucompressed, gzip -9 and gzip with
> > --rsyncable please.
> 
> Why do you want rsyncable rsync deltas?

No, rsync deltas on the data.tar.gz with --rsyncable. I.e. what one
would get on a plain deb if dpkg used --rsyncable.

MfG
        Goswin



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