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Re: Mail clustering

Cherubini Enrico schrieb am Dienstag, 20. Maerz 2007 um 16:37:25 +0100:
> Ciao,
>  Tue, Mar 20, 2007 at 04:27:36PM +0100, Marek Podmaka wrote:
> thanks for your reply.
> > First you should identify what is your bottleneck. Is it postfix? I
> the bottleneck is the hardware, a dual xeon 3.20GHz with 2GB of ram, that,
> is pretty high on load in the antivir/antispam server (of course).

Either your server handles a lot of mail or the bottleneck is somewhere
else, this hardware should be able to handle thousends of mails per

can you specify "pretty high on load"?
  - lack of memory?
  - lack of disk space?
  - disk i/o?
  - cpu load

> > RBLs). IMAP/POP3 can use some disk + CPU for sorting emails. But
> > usually the bottleneck is antivirus/antispam. So until you get disk
> > bottleneck I think one server for smtp + pop3/imap is enough and you
> > can use many servers for antivir/antispam. Which solution do you use?
> > Does it permit to define alternative hosts for antivir/antispam?
> as for the a/a server, we use postfix+various dnsbl+amavis+clamav (postfix
> patched for quota support), while the "standard" server is the same without
> dnsbl and all antivirus things.
> My idea is to use two servers, ie for the a/a, with round robin, to be able
> to balance the load because I'm sure that in a few months even a more
> powerful server reache the limit, without changing anything else in
> customers configurations, dns zones, and so on.
> -- 
> Bye Enrico
> Elefante: un topolino progettato secondo le indicazioni del governo.
> 		-- Robert Heinlein

Jörg Friedrich

There are only 10 types of people:
Those who understand binary and those who don't.

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