[imp] Server Farms..

[Ramon Kagan]

One thing that you "can" do is use 2 servers as LB and targets servers.
They load balance themselves and failover for themselves.  It's a weird
config, but I've used it while I've waited for new budgetary allocations
to acquire more hardware.

Ramon Kagan
York University, Computing and Network Services
Unix Team -  Senior Unix Systems Administrator
(416)736-2100 #20263
rkagan at yorku.ca

-----------------------------------   ------------------------------------
I have not failed.  I have just	       I don't know the secret to success,
found 10,000 ways that don't work.     but the secret to failure is
				       trying to please everybody.
	- Thomas Edison				- Bill Cosby
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On Wed, 31 Mar 2004, Lord Apollyon wrote:

>
> > My understanding was that you needed at least 4 machines to do this.
> > Two failover directors, and two target servers.
> > Is that correct?
>
> That depends on the desired level of redundancy.  Obviously, if you're load
> balancing... this implies there's more than one target server.  Let's call
> the number of target servers, T.  A minimal load balancer setup will just
> involve T+1 hosts.  The choice as to whether or not to make your balancer
> redundant is similar to whether or not to make your firewall redundant.
>
> Primary and backup LB's are typically connected via null modem [or an
> alternative ethernet link] for 'heartbeat' monitoring.
>
> Cheers,
>
> =R=
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