On Friday 31 October 2008 13:22:27 Brian Evans - Postfix List wrote: > Robert Schetterer wrote: > > Hi @ll, > > has anbody experience with > > postfix behind load balancers > > im planning to test > > ha-proxy > > pen > > balance(ng) on ubuntu hardy in a HA-Cluster > > in front of postfix servers > > The pro's and con's of load balancing has been discussed many times > here. Search the archives for details. > > A different, and possibly better, way to handle the load of mail is a > simple round-robin DNS or multiple MX records of the same priority. > > A load balance setup can, and probably will, change the TCP source. > This is important in the detection of mynetworks as well as the > requirement for the XFORWARD command. Otherwise, Postifx will not know > the true origination and always log the load balancer as the source.
Direct-Server-Return load balancing would not suffer from this problem, but it's about as good as multiple MX's, and a lot more complicated to setup. We use multiple MX's here to good effect. Mark. -- Mark Watts BSc RHCE MBCS Senior Systems Engineer QinetiQ Applied Technologies GPG Key: http://www.linux-corner.info/mwatts.gpg
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