Date Added: May 2011
Given the significant energy consumption of data centers, improving their energy efficiency is an important social problem. However, energy efficiency is necessary but not sufficient for sustainability, which demands reduced usage of energy from fossil fuels. This paper investigates the feasibility of powering internet-scale systems using (nearly) entirely renewable energy. The authors perform a trace-based study to evaluate three issues related to achieving this goal: the impact of geographical load balancing, the role of storage, and the optimal mix of renewable. Their results highlight that geographical load balancing can significantly reduce the required capacity of renewable energy by using the energy more efficiently with "Follow the renewables" routing.