I need install vSphere with Terminal Server VM and 2 x Windows 2003 servers acting as DCs for authentication only (no file, print or other services given by these DCs).
Most of the workload on the vSphere machine will be created by the Terminal Server VM. The TS will run 50 concurrent users with only one application - an ERP application based on Intersystems' Cache database.
The question is:
How do I make the right sizing for the expected hardware on which I will install vSphere?
Is there a 'rule of thumb' for Terminal Server for X number of users on vSphere?
I'm considering buying a rack mount HP DL 300 series on DL 500 series.