Web Balancing with multicast

[Ian Lord]

Thanks for the hint, but this is an active/passive software so only 
one host can answer request while others wait to see if they need to 
become master (because master has failed)


At 12:53 2005-11-09, Jon Krause wrote:

>----- Original Message -----
>From: "Ian Lord"
>Sent: Wednesday, November 09, 2005 12:37 PM
>Subject: Web Balancing with multicast
>
>
> > Hi,
> >
> > is there an application to load balance web traffic using multicast
> > on freebsd ?
> >
> > We have web servers currently running NLB (network load balancing) on
> > windows 2003 that  works this way (simplified for clarity):
> >
> > We have server A that listen on ip 10.10.10.11
> > We have server A that listen on ip 10.10.10.12
> >
> > Both server also listen to "virtual ip" 10.10.10.10. That ip is in
> > fact a multicast ip so that a request going to that ip is received by
> > both server. Windows load balancing then decide which of the 2
> > machines process the request. It also adapts itself if a server is
> > added or removed from the cluster (manually or on a failure)
> >
> > I saw there is a way with freebsd to add a machine in front of the
> > cluster that will direct the traffic and load balance the traffic
> > between a group of computers, but I'm looking for a solution similar
> > to windows load balancing that doesnt require a dedicated machine in
> > front of the cluster.
> >
> > If someone knows of an app that could do that, I would appreciate if
> > you could give me a url for the software in question...
> >
> > Please don't mention solutions that require the use of a dedicated
> > machine in front of the cluster. If there is no way to do this on
> > freebsd, I will simply use a cisco load balancer in front of my freebsd
>servers
> >
> > Thanks a lot
> >
>
>Please see CARP:
>http://www.freebsd.org/cgi/url.cgi?ports/net/ucarp/pkg-descr
>
>I think this might be what you are looking for.
>
>Best, Jon
>
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