A Fundamental Tradeoff Between Total and Brown Power Consumption in Geographically Dispersed Data Centers

This letter aims at deriving a fundamental tradeoff between the total and brown power consumption associated with geographical dispersed data centers, where utilizing more green energy mostly happens at the cost of increasing the total power consumption. To this end, we define a new service efficiency parameter for data centers in satisfying the QoS requirements based on the queuing analysis. More importantly, we propose the idea of modeling geo-dispersed data centers with an information flow graph to capture a total-brown power consumption tradeoff region. Accordingly, we characterize the achievable tradeoff between total and brown power consumption.