im going to run 2 exchange 2010 servers on hyper-v.i have sized to exchaneg server as intel 4 cores 2.4 single processor for each server.how can i calculate hyper-v server's processor requirementsamj

Here you have it - Guidance Change: Calculating the Megacycles for Different Processor Configurations FormulaJesper Bernle | Blog: http://xchangeserver.wordpress.com

we can use it for plane hardware allocation for the exchange server.but i want to plane the hardware for hyper-v hostDarshana Jayathilake

Well, if you do some reversed engeneering; you first calculate what your individual Hyper-V guests need in terms of CPU cycles and then sum that up you at least know the requirements for servicing the guests. Then you add what you believe you need for the Hyper-V host on top of that. You could also benefit in your planning to review the folowing document: Exchange 2010 Tested Solutions: 500 Mailboxes in a Single Site Running Hyper-V on Dell ServersJesper Bernle | Blog: http://xchangeserver.wordpress.com