Cost of virtualization and diminishing rate of returns

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Virtualization Cost Analysis
VMware ESXi
VMware ESXi 3.5
The following question was recently submitted via e-mail by a user: Using ESXi 3.5. I've seen tests done that usually put the cost of virtualization at 25% when VMs don't share the same kernel, and 10% when they do. I've noticed as you drop cores, the cost of virtualization as a percent of the total goes UP disproportionately. Is anyone else finding this? Is there a "sweet spot" for virtualization configuration in terms of price?

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VMware charges your per physical Processor for their software. They do not charge you per core, so the ROI calculator will use the same price divided by fewer processor cores.

I’ve found it is hard to adjust the ROI calculators to fit your environment and your goals. The best thing to do is compare the price of purchasing one server virtualizing say 10 servers to the price of purchasing 10 separate servers. That way you can get a ROI that better fits your environment.

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