Cyrus on Amazon EC2 and EBS?

Adam Tauno Williams awilliam at
Thu Feb 11 13:31:27 EST 2010

On Thu, 2010-02-11 at 12:02 -0500, Forrest Aldrich wrote:
> On 2/11/10 11:55 AM, Adam Tauno Williams wrote:
> > On Thu, 2010-02-11 at 10:35 -0500, Zachariah Mully wrote:
> >> Howdy all-
> >> Is anyone out there running Cyrus on an Amazon EC2 instance with EBS?
> >> During these brutal storms we've had in the DC area, we've been
> >> discussing how to improve the resiliency of our operations and getting
> >> our mail systems out of our CO and into a datacenter is high on the
> >> list. I'm looking for any feedback on using Cyrus with Amazon or any
> >> other 'cloud' service (I'm also looking at Rackspace's cloudserver
> >> offering as we're already a customer). Any gotchas, performance,
> >> reliability issues, etc? About 120 users, 300+GB mailstore.
> > I run Cyrus on a Linode VM.  I've been *very* happy with them.  And it
> > is just a 'normal' virtual server and not any odd-ball cloud thing.
> I wonder how people deal with the disk I/O deficiency under virtual 
> systems such as VMWare.   We decided not to virtualize any processes 
> that were disk I/O intensive.

Well, the person quoted is talking about a ~120 user Cyrus box.  Odds
are the I/O load is pretty light.  I've found that for a couple hundred
users you can run Cyrus on just about anything.
Adam Tauno Williams <awilliam at> LPIC-1, Novell CLA
OpenGroupware, Cyrus IMAPd, Postfix, OpenLDAP, Samba

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