[NTLUG:Discuss] Clustering related

[Greg Edwards]

m m wrote:
> Speak about clustering, I have a question on how to do a web server 
> cluster on Linux boxes.
> 
> this is waht I want:
> 2 or 3 (web) servers running for mydomain.com (example) domain
> when all servers are running, they share the requests (if there are 100 
> requests, each of them get 33,33,34 requests)
> if there any of them is (are) down/fail/die..., the rest of live ones 
> take over the them.
> 
> how is this possible?
> 
> thanks
> 


Load balancing rather than clustering is probably what you want to look 
at.  If you've got some $$$ you can get an appliance that will do this 
for you.  You can also do this from your firewall/router.

I was looking at some features in shorewall (firewall tool) that may be 
interesting to look at.  By doing some traffic shaping you might be able 
to do load balancing directly from your firewall.  This could get you a 
dynamic load balance without admin intervention.  I haven't looked very 
deep into traffic shaping as a solution.  Maybe someone else knows if 
traffic shaping could work as an entry point load balancing solution.

-- 
Greg Edwards
New Age Software, Inc. - http://www.nas-inet.com
======================================================
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