replication - more than 2 servers?

[Reindl Harald]

Am 16.12.2014 um 21:13 schrieb Ron Cleven:
> We tested dovecot for a fair amount of time and decided finally to put
> it into production under CentOS 7 (we are running 2.2.10).  I just
> joined the list, so I apologize for what is probably a question that has
> been answered many times, but I was wondering if there are any plans to
> implement replication among 3 or more servers (all "masters", as with
> 2)?  As best as I can tell, replication seems to be limited to 2
> servers, and it is not obvious to me even how more than 2 would be
> supported syntactically in the configs.  That is, what might be an
> example of the "mail_replica" clauses if such a thing was supported?

if you *really* have that large number of users and load you should 
split them to different servers (replicated server pairs) because you 
end in replication overhead eating away all the benefits otherwise

master-master replication independent of the software is somehow limited 
by phyiscs (delays, replication traffic, replication I/O) and can't 
scale endless

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