OSEC

Neohapsis is currently accepting applications for employment. For more information, please visit our website www.neohapsis.com or email hr@neohapsis.com
 
Subject: Re: Sizing a Postfix server
From: Wietse Venema (wietseporcupine.org)
Date: Mon Feb 14 2000 - 20:04:59 CST

On Mon, 14 Feb 2000, Doug Kratky wrote:
> - Need to send a few hundred thousand messages an hour - most under 2K
> bytes
>
> Is this something a Linux on Pentium box would be capable of doing? How
> about a low-end Solaris server?
> Does CPU (number of CPUs or CPU speed) tend to be the limiting factor?

He also sent me the question in private mail, and I replied in
private mail thusly:

That's about 100 deliveries per second. If each recipient has its
own queue file, no disk will be fast enough to handle the load.

If the file system is fast enough, and delivery of one message
takes N seconds (DNS lookup, connecting and disconnecting), then
you will have to run 100*N delivery agents in parallel. If a lot
of your mailings are going to AOL or YAHOO, then it is very unlikely
that you can send 100 emails a second into their networks.

        Wietse