With the rapid growth of Cloud services and applications, more and more researches have been focused on performance improvements of greater and larger Data Centers. What about their energy consumption? Have we reached the point where energy consumption is limiting further performance growth? The aim of this study is to give light to the answers for these questions by presenting an overview of the energy issue in cloud computing. This paper provides an overview of researches and reports published in the latest three years, 2010-2013, in the fields of Cloud Computing Energy Efficiency improvements and awareness.
energy efficiency, power consumption, green cloud computing.