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The interest is all the greater as the return on the investment in virtualization can be calculated, or at least estimated. Of use in this respect are e.g. the tools and calculators made available by technology providers themselves. Virtualization saves on the expenses incurred on upgrading hardware infrastructure within the space of several years. Less physical equipment means less staff to operate and service it, and practically results in the opportunity for improving the quality of IT services. Less physical equipment also reduces energy costs, lowers air-conditioning requirements (since the number of servers affects heat emission considerably) and decreases the demands on space in server rooms – i.e., virtualization makes it possible to build or hire a smaller data center, or to vacate some space in the server room. Significantly, the return on investment is clearly noticeable as early as the first months after the implementation.
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