Presentation on theme: "Measuring and analyzing the energy use of enterprise computing systems Xiuming Zhang."— Presentation transcript:
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 One power meter per device
Appliance Types Measured
Extrapolating to the Whole Building
Power Share by Type 4 types: PC, LCD, server, switch
PC Binned into 3 categories – Laptops – Low-end – High-end 742 in total – 456: description available. The other: assume same distribution.
Lower brightness & use dark backgrounds
Server Monitors 32 of the 500 servers Calculated average power: 233 W Estimated total power of 500 servers: 117 kW
PC CPU Utilization 95% of the computers have a utilization rate lower than 30%
Network Switch Utilization The demand never exceeded 200 Mbps
Network Switch Utilization Highly underutilized Total network demand < 1000 Mbps 100% of the time.
How does the sampling frequency affect what the data reveal? Too small hide the anomalies
How big is the variance between two instances of same model?
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 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? One-month scale yields an acceptable error
Are Energy Star data representative? Energy Star Standard does not consider PCs under load