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A fundamental component of any large-scale computer system is infrastructure. Cloud computing has completely changed the way infrastructure is viewed, offering more simplicity, flexibility, and monetary benefits compared to a traditional view of infrastructure. At the core of this transformation is the notion of virtualization of infrastructure as a whole, with providers offering infrastructure-as-a-service (IaaS) to consumers. However, just offering IaaS alone is insufficient for software defined environments (SDEs). This paper examines infrastructure in the context of SDE and discusses what we believe are some of the fundamental characteristics required of such infrastructure—called
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