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Large, Internet based companies service user requests from multiple data centers located across the globe. These data centers often house a heterogeneous computing infrastructure and draw electricity from the local electricity market. Reducing the electricity costs of operating these data centers is a challenging problem, and in this paper, the authors propose a novel solution which exploits both the data center heterogeneity and global electricity market diversity to reduce data center operating cost. They evaluate their solution in their test-bed that simulates a heterogeneous data center, using real-world request workload and real-world electricity prices.
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