We are converting our data center with 300 plus servers and I am trying to collect some information from other people who have deployed ESX...

Basically we need to figure out a starting point for reserve resource allocation etc. IE a best practices or what other people are doing kind of thing. I'm sure these will change once we start using it, but I'd like to make a best guess attempt.

IE for memory if we a Windows server should we by default set it up to reserve 25% of it's memory when we create a new virtual machine. So for 1GB we would reserve 256MB etc.

Same thing for CPU, should we reserve say 10% of the cpu. So if we had a single proc VM we would reserve 10% of 1 cpu, if we had dual proc we would reserve 10% of 2 cpu's etc.

Should we make the SAN LUNs RAID 10, or are most people doing RAID 5 etc.

Any other best/recommended practices.

I know that most of these answers will not apply to every situation, but I'm just looking to get defaults.

Thanks for any help,

Chris