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High-performance IT consumes power and generates heat in enormous quantities - moving IT energy costs up corporate and even national agendas. Environmental, energy-cost, and space-planning considerations all call for conservation through a combination of operational changes, hardware replacement, and - especially - management software to cut waste and build efficiency. Continuous inventory of server resources and optimization of their use - particularly in high-availability cluster configurations - helps data centers do more with less, even as they improve performance and service levels. Virtualization offers compelling economies, but demands sophisticated solutions for the availability, visibility, and complexity issues that the technology may introduce.
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