dovecot - Sep 2009 - Running dovecot master processes across multiple IPs

We are running dovecot 1.1.8 and are currently running it with 4 master
processes (one for each of the protocols: imap, imaps, pop3, pop3s).
The idea was to spread out the load so as to not overwhelm any one master.
This has worked well.  To take it further, we're contemplating running
masters across multiple IP addresses, where the host/service name DNS
records would be something like this:

imap-server.domain	A	10.1.1.1
			A	10.1.1.2
			A	10.1.1.3
			A	10.1.1.4

The default route would either be through the first address (10.1.1.1 in
this example) or potentially across all of them in presumably a round-robin
fashion.

Do you see any problems with this?  Has anyone done this?

-- 

Steven F. Siirila			Office: WBOB, 624J
Internet Services			E-mail: sfs at umn.edu
Office of Information Technology	Voice: (612) 626-0244
University of Minnesota

On Thu, 2009-09-24 at 17:41 -0500, Steven F Siirila
wrote:
> We are running dovecot 1.1.8 and are currently running it with 4 master
> processes (one for each of the protocols: imap, imaps, pop3, pop3s).
> The idea was to spread out the load so as to not overwhelm any one master.
I hope v2.0 will also help with this in future. :) If not maybe it'll
still need some changing so that it can internally run multiple master
processes..
> This has worked well.  To take it further, we're contemplating running
> masters across multiple IP addresses, where the host/service name DNS
> records would be something like this:
> 
> imap-server.domain	A	10.1.1.1
> 			A	10.1.1.2
> 			A	10.1.1.3
> 			A	10.1.1.4
> 
> The default route would either be through the first address (10.1.1.1 in
> this example) or potentially across all of them in presumably a round-robin
> fashion.
> 
> Do you see any problems with this?  Has anyone done this?
I don't see any problems.
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