Tony Nelson wrote:
The annoying parts for me are that after finding the things I want, yum
repeats the metadata download for every install step and goes out of its
way to avoid allowing the site proxy cache from supplying it or the rpms.
Perhaps your yum is improperly set up.
Well, from my perspective (and I think for anyone with multiple machines
behind a caching proxy) it is improperly designed.
> Yum caches whatever it has
downloaded before, but it can be configured to delete the cache upon
sucessful installation (keepcache=0).
Yes, this is correct but it still insists on contacting every repository
which has a significant time penalty even if you just did that seconds
before. I assume it gets/parses/randomizes a mirrorlist for every
repository before doing this check for new items that won't exist.
> Yum defaults to spreading the load
over all the mirrors by randomly choosing a mirror each time,
And it does this in a way that makes your proxy cache download a new
copy for every request.
> but it can be
configured to use a baseurl list instead, which allows you to use the same
mirror each time, with fallbacks when that mirror is not available.
Please translate that into the commands that people served by the same
proxy should use to update their machines, keeping in mind that they may
not know about each other or have anything else in common. If that's
not possible, translate it into what one user has to do to update 2
machines, keeping in mind that yum was supposed to make things easier.
In any event, yum does not normally ever reparse the metadata it downloads.
That happens once, just after the data is downloaded, and not at all for
the .sqllite files. Perhaps using a proxy is your problem, or more likely
an improperly set up proxy, as usually the worst that can happen is that,
when the mirror one starts at is not fully updated, yum switches to another
mirror for anything it needs that is missing, and sometimes that mirror is
also not up to date but in different places. I expect that a broken proxy
setup could make this happen all the time.
I don't bother using a proxy except for Centos 3.x where the mechanism
isn't broken. It still takes much more startup time than a machine that
uses apt-get.
--
Les Mikesell
lesmikesell@xxxxxxxxx
