Would like to start a discussion to whats important for virtualiztion, should it be the number of cores on CPU or the CPU speed. what CPU Presently in market is best suited for a test environment AMD Phenom 6 core or a intel i5 quadcore
As far as processing itself goes, I believe that core count matters more than individual core speed. More cores equates to more VM density from a pure ratio perspective. We've been using 6 core Intel processors in our new vSphere hosts at work and they've worked extremely well (5600 series processors).
What I know is, it depends on more than just CPU speed and number of cores. But number of cores does not scale up exactly proportionally with performance. am i right Scott?
As server workloads vary, virtualization provides the ability for virtual machines that are over utilizing the resources of a server to be moved to underutilized servers.
Absolutely! Workload means much more than pretty much anything when it comes to comfiguring a virtual machine. You don't want to under spec a virtual machine, but you don't want to waste resources, either. That said, CPU performance is generally the last resource to be fully consumed in a virtual environment - RAM and disk will get eaten up first.
In a traditional server virtualization scenario, RAM will generally be the first resource to be exhausted. However, in VDI, keep a sharp eye on storage system performance as this is the first metric that is likely to get out of line because of the way that users interact with desktop PCs.
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Virtualization clarification - 
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