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Measuring and analyzing the energy use of enterprise computing systems

Measuring and analyzing the energy use of enterprise computing systems. Xiuming Zhang. System Deployment. Powernet : a hybrid sensor network that monitors the power and utilization of the IT systems in a large academic building Over more than two years 250+individual computing devices

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Measuring and analyzing the energy use of enterprise computing systems

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  1. Measuring and analyzing the energy use of enterprise computing systems Xiuming Zhang

  2. SystemDeployment • Powernet:a hybrid sensor network that monitors the power and utilization of the IT systems in a large academic building • Over more than two years • 250+individual computing devices • Onepowermeterperdevice

  3. Appliance TypesMeasured

  4. ExtrapolatingtotheWholeBuilding

  5. Power Share by Type • 4 types: PC, LCD, server, switch

  6. PC • Binned into 3 categories • Laptops • Low-end • High-end • 742 in total • 456: description available. The other: assume same distribution.

  7. LCD

  8. LCD • Lower brightness & use dark backgrounds

  9. Server • Monitors 32 of the 500 servers • Calculated average power: 233 W • Estimated total power of 500 servers: 117 kW

  10. Switch

  11. Switch

  12. PCCPU Utilization • 95%ofthecomputershaveautilizationratelowerthan30%

  13. PopularWorkloads

  14. NetworkSwitchUtilization • The demand never exceeded 200 Mbps

  15. NetworkSwitchUtilization • Highly underutilized • Total network demand <1000 Mbps 100% of the time.

  16. Discussions

  17. How does the sampling frequency affect what the data reveal? • Too small  hide the anomalies

  18. How big is the variance between two instances of same model?

  19. Does sampling a few devices provide an accurate average measurement? shows the wide distribution of desktop power

  20. Does sampling a few devices provide an accurate average measurement? • Large sample size desired for PC • 1,000,000 random samples of size 5, 10, and 20, drawing from 69 machines

  21. Do short-term measurements accurately reflect long-term power draw? • One-month scale yields an acceptable error

  22. Are Energy Star data representative? • Energy Star Standard does not consider PCs under load

  23. Thanks for the attention!

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