Sascha Lucas wrote:
Just some keywords:
easy with postfix: DNS round robin (solution inside DNS Server, nearly
all MTAs are aware of this)
So DNS round robins between the two mail servers. A new mail comes into
server1, how does this mail make it to server2.
mysql: not "multi master" ready, just redundancy "master->slave", try
postgres
I don't see that Postgres supports multiple masters either. Circular
replication under Mysql may be a possibility if your db traffic isn't
too high.
apache: behaves in sens of "read only" -> LVS
cyrus: moast difficult part (shared storage/CFS,???) ->
NAS|SAN+CFS+LVS+?dono?
The storage has to reside somewhere. If that site goes down, both
servers go down. You either need both servers in the same site with
shared storage or figure out how to do a shared nothing backend.
kashani
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