Free e-book: Network Virtualization for Dummies Second Edition - Eric Sloof - frikilife.comFrom Virtualization For Dummies. Virtualization saves money, energy, and space. It saves money: Virtualization reduces the number of servers you have to run, which means savings on hardware costs and also on the total amount of energy needed to run hardware and provide cooling. It reduces system administration work: With virtualization in place, system administrators would not have to support so many machines and could then move from firefighting to more strategic administration tasks. It makes software installation easier: With software vendors tending more and more towards delivering their products preinstalled in virtual machines also known as virtual appliances , much of the traditional installation and configuration work associated with software will disappear.
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The basic idea behind virtualization is to use software to simulate the existence of hardware. This powerful idea enables you to run more than one independent computer system on a single physical computer system. For example, suppose your organization requires a total of 12 servers to meet its needs. You could run each of these 12 servers on a separate computer, in which case you would have 12 computers in your server room. Or, you could use virtualization to run these 12 servers on just two computers. In effect, each of those computers would simulate six separate computer systems, each running one of your servers.
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