On 3/17/2010 4:14 PM, Seth Vidal wrote:
So you have to maintain 2 things in sync instead of just one, and
since every host behind a cache is likely to choose a different mirror
name you end up downloading 10 copies of every update - or however
many mirrors there are.
a different mirror name? What are you talking about.
You don't keep 2 things in sync - you just keep one - don't use the
round robin at all.
ONLY use the mirrorlists.
Doesn't the mirrorlist refer to the DNS names? So if you add, delete,
or move a mirror you'd have to update DNS for its name, then put the DNS
name in your mirrorlist - and you have two things that can get out of
sync, both cached in various places.
since yum is the thing that has to access the repos/pkgs only the
mirrorlist matters.
So each host behind a squid picks a name from the list and since they
are likely different names, squid won't know the target url is already
in its cache. And getting/managing copies of the mirrorlist is much
slower than a new DNS lookup. There's probably a rare case where being
able to 'yum clean all' on demand is quicker than waiting for an
intermediate DNS cache to refresh and clear a bad entry, but things have
gone badly wrong if you need that.
--
Les Mikesell
lesmikesell@xxxxxxxxx
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