Hi all,
I've just had an interesting lesson in what happens to cvmfs
when its one and only squid server dies underneath it, and
now I'm thinking about getting some redundancy into the
system.
cvmfs itself supports multiple squidd, so it's just a matter
of having multiple squid servers available. The Tier 1 has
a couple, but for everyone else I was wondering whether it
would make sense to handle this in a similar manner to how
we deal with the Frontier squids and have cross-site failover?
As far as I can see we could:
- use the same basic idea,
- use the exact same relationships, so everyone fails over
their cvmfs squid to the same place they fail over their
Frontier squid (which makes sense because in a lot of
cases they're the same squid),
- have everyone fail over to the Tier 1,
- something else,
- nothing at all, and just leave it to each site to run
a pair of squids.
I think I'd favour either the second or third options, but
I'd be interested to know what everyone thinks, and indeed
how everyone else with deployed cvmfs is handling this now.
Ewan
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