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Why is virtualization needed for cloud computing?

Asked 2010-08-30T05:04:30.530
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Can anyone explain me why is virtualization needed for cloud computing? A single instance of IIS and Windows Server can host multiple web applications. Then why do we need to run multiple instances of OS on a single machine? How can this lead to more efficient utilization of resources? How can the virtualization overhead be worth it? Is it strictly a matter of economics - I have money to buy only 100 machines, so I run virtualization to pretend I have 1000 machines?

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Virtualization usually helps to separate concerns, keep things isolated and more secure. Besides it's much easier to go for the on-demand consumption scenarios in virtual environments

These benefits are worth the higher resource consumption even for large deployments. This translates directly into the economical benefits and cost savings.

answered 2010-08-30T07:27:19.087

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