On Sunday 31 August 2008 01:06, Sahil Tandon wrote: > Stefan Jakobs <[EMAIL PROTECTED]> wrote: > > 3) Keep the actual server organisation: 4 servers with postfix, > > amavisd, spamassassin, clamav. > > Advantage: Known configuration, easy to extend > > Disadvantage: problem with loadbalancing > > Would you describe the problem you're having with load balancing? We've > had luck balancing load at the firewall (using the round-robin feature in > OpenBSD PF) instead of with multiple A records for a MX hostname (your > current setup).
We had some issues as the servers were under heavy load. One of the servers processed much (~twice) more messages than the others. If I remember it right, then it is due to the round robin mechanism that the slowest server gets as much more work as there are servers. At least if the slowest server is not able to accomplish its work load in one round. We were able to reduce the load significantly, so this is no actual issue. But we like to avoid known problems in the future. May I asked how the setup of loadbalancing with PF looks like? Is it just a OpenBSD server in front of the mailservers? Greetings Stefan
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