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Numerous studies have shown that datacenter networks typically see loads of between 5%-25% but the energy draw of these networks is equal to operating them at maximum load. In this paper, the authors propose a novel way to make these networks more energy proportional - that is, the energy draw scales with the network load. They propose the idea of traffic aggregation, in which low traffic from N links is combined together to create H < N streams of high traffic. These streams are fed to H switch interfaces which run at maximum rate while the remaining interfaces are switched to the lowest possible one.
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