1. Spiros Papadimitriou Google Research Project re:Cycle Recycling CPU Cycles Stavros Harizopoulos HP Labs

2. What happens to old computers, servers, cell phones? Can we do better?

3. What happens to old computers, servers, cell phones? Can we do better? Turn old smartphones into micro-data center modules

4. A billion smartphones will become obsolete in the next 5 years

5. Their compute power equals all 500 top supercomputers..at a fraction of the energy needs We propose Micro-Cellstore Architectures: composable, ultra-”wimpy” node, data appliances

7. Related work - FAWN (Carnegie Mellon) - Amdahl blades (Johns Hopkins) Further reading - A Case for Micro-Cellstores: Data Management on Recycled Smartphones (DaMoN 2011) - Analyzing the Energy Efficiency of a Database Server (SIGMOD 2010)

8. Research questions Architecture -Design: ratio of phones/routers/external storage -Networking: WiFi vs. USB vs. Ethernet -Operational costs: power & cooling, installation, repairs Software -Workloads for MCS architectures -Data layout, compression, query processing methods -“Knobs” for controlling energy efficiency -Scalability of “wimpy” node architectures -Hybrid installations of MCS / traditional servers

9. A Grand Challenge provide sustainable and recyclable IT infrastructure e.g., for developing countries

10. backup slides