use machine learning to reduce power

http://googlegreenblog.blogspot.com/2016/07/deepmind-ai-reduces-energy-used-for.html

We accomplished this by taking the historical data that had already been collected by thousands of sensors within the data center — data such as temperatures, power, pump speeds, setpoints, etc. — and using it to train an ensemble of deep neural networks. Since our objective was to improve data center energy efficiency, we trained the neural networks on the average future PUE (Power Usage Effectiveness), which is defined as the ratio of the total building energy usage to the IT energy usage. We then trained two additional ensembles of deep neural networks to predict the future temperature and pressure of the data center over the next hour. The purpose of these predictions is to simulate the recommended actions from the PUE model, to ensure that we do not go beyond any operating constraints.

historical data are important!

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