----- Original Message -----
From: "Peter McGarvey" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, May 23, 2003 10:46 AM
Subject: [SAtalk] SpamAssassin on a high load mail system


> Hi all.
>
> I'm currently running SA spamd with Exim and exiscan_acl.  Everything is
> fine, and I'm more than happy.  However, my system doesn't handle that
> much mail.  Based on my positive experiences, I'm investigating
> installing SA on an system which handles >10K messages a day.
>
> I was wondering if anyone has run SA on a similarly loaded system.
>
> And, if so, what's the performance like.
>
> Several people have mentioned to me that, being perl based, SA won't
> scale particularly well.  I've never had problems scaling perl apps in
> the past, so I didn't worry - until others started sticking their oar
> in.  So any evidence/anecdotes to put my mind at ease would be greatly
> appreciated.
>
>
> --
> TTFN, FNORD
>
> Peter McGarvey
> Freelance FreeBSD Hacker
> (will work for bandwidth)
>
>
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Peter

we are running spamd with Exim - currently in pre-trial stage but
effectively with full load as all messages are going through the filters
(but with spam headers removed).

Currently processing between 2.5-3 million incoming mails a day and it's
coping well - although concentrated spam attacks can give us some grief.
Briefly, our setup is 6 incoming Exim SMTP servers, 4 secondary SMTP
servers, and 6 SpamAssassin servers. This is soon to be extended by 3 more
Exim boxes. The Exim boxes are mostly SUN E450/E420s with a few IBM X345's
running Linux. The SA boxes are all IBM blades running Linux.

The biggest performance hit I guess we have is that we can't use something
like exiscan or sa-exim as we need each message to have per-user settings -
although we are currently running with system-wide defaults. When we do real
per-user settings (via SQL) then we will be introducing a few MySQL servers
for spamd look-ups.

The biggest performance boost we got was splitting SMTP and SA onto separate
servers.

HTH

Paul





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