Power data alone cannot identify sources of energy inefficiency. However, correlating power data with utilization statistics can reveal where power is used well and where it is wasted. We describe a sensing in- frastructure, PowerNet, that monitors power and utilization in a building environment. The deployment includes both wired and wireless sensors and cov- ers offices, networking closets, and server racks. We present PowerNets architecture, then generate ini- tial insights from each monitored environment. Ana- lyzing PowerNet data traces identifies contexts where electricity consumption can be reduced without cost, and others which call for rethinking system designs altogether.
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