A more efficient up2date service using binary diffs

[Joe Desbonnet]

I have more results from my experiments in RPM delta compression. I've posted
the results so far here: http://www.wombat.ie/software/rpmdc/index.shtml

Conclusion so far: assuming someone has the distribution RPMs
available then an entire
update repository (about 1GB) can be generated from 200MB of files. 

I hope to post my code once I clean it up a bit (it's implemented in
Java currently).

Must check out rdiff also...

Joe.




On Sun, 13 Mar 2005 20:44:15 +0000 (GMT), M A Young
<m.a.young at durham.ac.uk> wrote:
> 
> libgcj-4.0.0-0.31.i386.rpm 13942525
> libgcj-4.0.0-0.32.i386.rpm 13950302
> xdelta of rpms              6911651
> same (no compression)       7025625
> xdelta of header + cpio     3723074
> same (no compression)       8604163
> rdiff of rpms               7310525
> same (gzipped)              7159019
> rdiff signature of 1st rpm    81708
> rdiff of header + cpio     17870597
> same (gzipped)              5582770
> rdiff signature              190476
>