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Oracle® Solaris 11 System Virtualization Essentials, Second Edition by Bob Netherton, Gary Combs, Jeff Savit, Jeff Victor

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7. Automating Virtualization

Early computers were expensive, prompting their owners to squeeze all possible value out of them. This drive led to the introduction of time-share operating systems, on which many workloads may run at the same time. As per-unit cost dropped, single-user, single-workload operating systems became popular, but their adoption created the mindset of “one workload per computer,” even on servers. The result was an explosion of under-utilized servers. The high costs of maintaining so many servers led to the widespread embrace of virtualization, with the goal of reducing the quantity of servers owned by organizations. Consolidation via virtualization may have reduced a company’s hardware acquisition costs, but it did nothing ...

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