18. OpenStack

Up until now, we have looked at transforming conventional data centers—with their inefficient, expensive architectures and server sprawl—into more streamlined models that consolidate many small servers onto a few larger ones through the use of virtualization. This transformation from a conventional model to a virtualized model could be accomplished using any of the server virtualization technologies to create a private cloud. By now, you should be well aware of the benefits of turning a data center into a private cloud, but this still falls short of cloud computing, which suggests that cloud computing is more than “just” server virtualization. This, of course, leads us to this question: What is the difference between virtualization ...

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