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

>I have 8 identical servers that I need to use to run 4 different types of
>servers. I would like to set up 4 clusters of 2 servers each to accomplish
>this. Ideally, I'd like each cluster to provide high availability as well as
>load balancing. However, it seems that all the topology diagrams for
>providing both these services necessitate 4 machines - a primary router, a
>backup router and 2 "real servers" to do the actual work.
>
>Which brings me to my question: is it possible/feasible to set up clusters
>of two machines in each, in which each machine is acting both as a router
>and as a "real server," in order to provide both load balancing and high
>availability? Or could I have one set of two routers that manage servers in
>4 different clusters?

-- 
Karl Wyant
Saturn Systems
11 East Superior Street
Suite 420
Duluth, MN 55802
Phone: (218) 727-5343 x112
Email:  [email protected]
http://www.saturnsys.com