ENERGY CONSERVATION FOR SERVER SYSTEMS by EDUARDO SOUZA

OF THE DISSERTATION Energy Conservation for Server Systems by EDUARDO SOUZA DE ALBUQUERQUE PINHEIRO Dissertation Director: Ricardo Bianchini To date, energy consumption has only been a concern for mobile and embedded devices due to battery lifetime and heat dissipation concerns. In this thesis we make the case for energy conservation for server systems. We describe in details the current mechanisms for power management and the state-of-the-art policies for energy conservation for the main components of servers. We propose three novel energy conservation techniques for servers, namely Load Concentration, for entire servers; Popular Data Concentration, for disk arrays; and Diverted Accesses for distributed file servers. Our experiments, physical measurements, simulations, and models show that our techniques can greatly enhance the opportunities for power management and consequently accrue significant energy savings.