On Nov 20, 2006, at 06:34, Marcelo Maraboli wrote:
Andrew
thanks for the "scalable" Cyrus solutions, but I´m wondering
what can be done for Availability solutions ??
What if an IMAP server dies (we had this happen) ??
We have a Solaris Server with a RAID5 disk array storing the
MBOX, but the server died....so downtime was a bit huge..
I wan to build a 100% available IMAP solution...is there any?
Even with a couple dumptrucks full of money, nobody could pull off 100%.
...but you can get really close.
Consider housing your storage on *two* individual storage devices,
potentially in different buildings. Mirror between them at the host
level (cheap), or, through multiple redundant storage virtualizers
(pricey)
Set up an active/passive cluster. Relatively "easy" to do nowadays.
Or go the clustered FS route (but then you'd probably need the
storage virtualizers)
Basically, for each '9' after 99% uptime, expect to double your cost
and complexity of implementation.
-rob
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