yum-fastestmirror

I've been using the yum-fastestmirror plugin for doing our upgrades this 
week and here are some observations.

y-fm does not end up selecting the fastestmirror.  It just picks mirrors 
close to us.  But these aren't the best mirrors.

y-fm should use some type of true throughput testing (yes this would be 
slow but do it as a separate process in the background and build a cache 
of results) then when yum starts up it just reads this file.

Some of the mirrors are broken.  For instance, with F9 we were still 
getting all the files in updates instead of the new PackageLibs and 
transition files that then redirect to updates-newkey.  Yum needs to 
have some type of quality check by retrieving the metadata from a known 
good source (fedora) and then comparing to the metadata retrieved from 
the mirror.  If they are different then you have a bad mirror and it 
should go to the next mirror.


Regards,
Gerry