measuring and analyzing the energy use of enterprise computing systems
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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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Presentation Transcript
system deployment
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
power share by type
Power Share by Type
  • 4 types: PC, LCD, server, switch
slide6
PC
  • Binned into 3 categories
    • Laptops
    • Low-end
    • High-end
  • 742 in total
    • 456: description available. The other: assume same distribution.
slide8
LCD
  • Lower brightness & use dark backgrounds
server
Server
  • Monitors 32 of the 500 servers
  • Calculated average power: 233 W
  • Estimated total power of 500 servers: 117 kW
pc cpu utilization
PCCPU Utilization
  • 95%ofthecomputershaveautilizationratelowerthan30%
network switch utilization
NetworkSwitchUtilization
  • The demand never exceeded 200 Mbps
network switch utilization1
NetworkSwitchUtilization
  • Highly underutilized
  • Total network demand <1000 Mbps 100% of the time.
does sampling a few devices provide an accurate average measurement
Does sampling a few devices provide an accurate average measurement?

shows the wide distribution of desktop power

does sampling a few devices provide an accurate average measurement1
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
do short term measurements accurately reflect long term power draw
Do short-term measurements accurately reflect long-term power draw?
  • One-month scale yields an acceptable error
are energy star data representative
Are Energy Star data representative?
  • Energy Star Standard does not consider PCs under load
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