Hi Guys,
I need to size several servers physical CPU wise according to the following formula: N! / (R!(N-R)!)
where N=the number of physical CPUs on the ESX Server host and R=the number of VCPUs on the machine being scheduled.
More about that formula at http://www.vmware.com/pdf/tips_tricks_infrastructure_services.pdf
But before that I need to clearly understand how VMware and ESX 3.x work with multi core physical CPU.
So is a core considered by the ESX 3.x as an independant physical CPU or physical just means socket ??
Could VMware come up with a clear statement about this, or could please point me to an existing one 
?
This is very importnat when you need to size up hardware to run guests with 4 vCPU each, because of the way scheduling works, a 4 vCPU can actually be much slower than a 2 vCPU !
Thx for your help,
Didier