On Thu, Jul 21, 2005 at 02:11:37PM -1000, Clifton Royston wrote:
> On Wed, Jul 20, 2005 at 08:27:01PM -0400, Matt Juszczak wrote:
> > Hi all,
> >
> > We're running postfix right now on our mail server. Mail server always
> > has 97% CPU idle and we have 4 gb of RAM, to which most is usually free.
> >
> > We deliver mail for about 5000 accounts, but our spam filtering is
> > currently outsourced to Postini. I don't know off the top of my head how
> > hammered postini gets for messages addressed to our domain names, but I'm
> > sure its a lot (we've been an ISP for 10 years).
> >
> > I have amavisd-new running on this mail server with anti virus and spam
> > assassin. I'm afraid that when we turn postini off and switch our MX
> > records over, the machine will just get overloaded, even though its dual
> > xeon 3.4 ghz/4 GB RAM, etc....
>
> I have tested an estimated 400K messages per day throughput on a dual
> 3.0GHz Xeon with 2GB RAM, running Postfix + amavisd + clamAV + some
> extra (proprietary) software, but not doing final delivery to mailboxes.
>
> I think you're probably OK. In your shoes, I would sure want to have
> a duplicate machine configured to test on though. I understand that's
> a bit expensive but it sure makes life simpler when upgrading software,
> trying out new configurations, etc.
Ah, I caught up with your messages later in the thread. Here's what
I would do in your shoes:
* Dedicate the "slower" (dual 3GHz + IDE) server to be a spare for
testing the mailserver, plus miscellaneous non-critical use.
* Load the same software versions on it, and configure it identically
(in terms of software) to your real mailserver.
* Add amavisd + clamAV + SA and whatever other antispam solutions
you're thinking of using.
* Stress-test it for yourself using a mix of tools like postal, etc.
I'm betting it will do fine, and having done that, you should have
reasonable confidence that it will run OK on the faster server. You
can also test upgrades to your other mailserver software going forward.
:-)
-- Clifton
--
Clifton Royston -- [EMAIL PROTECTED]
Tiki Technologies Lead Programmer/Software Architect
"My own personal theory is that this is the very dawn of the world.
We're hardly more than an eyeblink away from the fall of Troy, and
scarcely an interglaciation removed from the Altamira cave painters. We
live in extremely interesting ancient times.
I like this idea. It encourages us to be earnest and ingenious and
brave, as befits ancestral peoples; but keeps us from deciding that
because we don't know all the answers, they must be unknowable and thus
unprofitable to pursue." -- Teresa Nielsen Hayden, 1995
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