RE: Question about high availability/load balancing

Hello,

Allow me to be more specific. I need to run 4 different pieces of server
software (custom written for my application.) I intend to dedicate 2 servers
to each one of these tasks.

Your point about running each machine as both a "real server" and as a
router being a messy setup is well taken. My question, then, is that if I
have 4 independent clusters each running a different task, can I just get 2
more machines, and use them as the routers for all 4 clusters? Or is it
possible to set this whole thing up as one cluster, even though different
members of the cluster are performing different tasks?

Please excuse my newbie-ish questions. :) If anyone has an insight that
might help me, or any links to reading material that might be helpful, I'd
be most appreciative.

Regards,
Martin Goldman

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Karl Wyant
Sent: Monday, July 29, 2002 7:02 PM
To: [email protected]
Subject: Re: Question about high availability/load balancing


By different types of servers, I am assuming you mean web servers,
ftp servers, etc.  If my assumption is correct, you merely need the 2
initial controllers and can use the remaining 6 boxes to be the
actual servers.  I am uncertain why you would need 4 different
clusters.  You can run different types of services within the same
cluster (private network).  This is, in my opinion, a much cleaner
environment than attempting to use a machine as both the lvs director
and a real server concurrently.

All of my exxperience is with lvs rather than fos, but my
understanding is that with fos you could have 4 sets of 2 machines
with failover, but not load balancing.

Karl