No more deltarpms by default
Richard W.M. Jones
rjones at redhat.com
Mon Oct 6 11:00:04 UTC 2014
On Mon, Oct 06, 2014 at 04:41:07AM -0400, Rahul Sundaram wrote:
> One of the long standing features that were enabled by default in yum is
> support for delta rpms. dnf developers have disabled this and I think this
> change deserves a broader discussion
The amount of time taken to rebuild rpms from delta rpms meant that
they didn't seem to save anything for me.
I had always assumed that this is because the rebuilding code was
written in Python. In fact this is not so! Although the yum-presto
plugin is written in Python, it just calls out to the applydeltarpm
program written in C (assuming I'm looking at the right place:
Has anyone analyzed why the rebuild step is slow? Seems like the best
thing to do would be to make it faster if possible.
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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