Clustering/Cloud/Load Balancing advice...

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http://forums.fedoraforum.org – Greetings, I'm looking for some pointers, and I'm not sure where to go for advice. I have a server farm consisting of 9 servers, separated into two zones (DMZ/LAN). Each server provides it's own, separate function (mail, www, vpn, snort, DNS, Proxy, NFS, nagios, etc). I had looked into downsizing this into three servers, where each of the servers I have currently running would be running in a virtual instance. I thought I had found a solution, but now that I have the money saved up for it, I'm not so sure because terms seem to be changing. I seem to be getting more and more confu (HowTos)