Save time on downloads with delta RPMs in Fedora 11

Paul W. Frields stickster at
Fri Sep 4 23:18:20 UTC 2009

On Fri, Sep 04, 2009 at 08:56:35PM +0530, Rahul Sundaram wrote:
> Hi
> "Fedora 11 introduced a great new feature: delta RPM updates. This
> feature creates delta RPM packages (.drpm) that are binary “patches” to
> the existing RPM packages. Instead of downloading all files, regardless
> of whether they have changed or not, a delta RPM will only download the
> files that have changed compared to the previous RPM package.
> Once the delta RPM is downloaded by the Presto plugin for yum, it will
> try to reconstruct a full RPM based on the contents of the previous RPM,
> plus the newly changed files from the delta RPM. The newly-created RPM
> will then be installed by yum."

I think it would be fair and right for us to note in interviews or
followup that the deltaRPM code comes from our friends in the openSUSE
community.  Credit where credit is definitely due!

Paul W. Frields                      
  gpg fingerprint: 3DA6 A0AC 6D58 FEC4 0233  5906 ACDB C937 BD11 3717   -  -  -  - stickster @ #fedora-docs, #fedora-devel, #fredlug

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