load balancing - email server

[Etienne Ledoux]

On Thursday 28 April 2005 10:04, Oliver Brandmueller wrote:
> Hi.
>
> On Thu, Apr 28, 2005 at 09:44:12AM +0200, Etienne Ledoux wrote:
> > I have a similar setup but I use ipf (ipnat round-robin) for my load
> > balancing, on a freebsd box infront of the machines. Works just as good.
>
> Never looked at it; is it able to do weighting and failover? How does it
> detect, if a service is down on one of the machines, so that you don't
> have every third connection failing?
>

Well I guess it's not that fancy. It's just plain vanilla round-robin load 
balancing. I use other tools to detect services that die, queues not clearing 
etc. I also use freevrrpd for failover. There use to be a project called 
lload. This apparently in conjunction with ipfw could do weighted load 
balancing but I can't seem to find that anymore. I guess it died. I'm sure 
there might be similar projects though.