177x Filetype PPTX File size 0.44 MB Source: cs.ucf.edu
Utility Computing • Long been a vision • Grid computing failed to really catch on • Technology advances as well as a viable business model have helped Cloud Computing catch on • Cloud Computing allows for fuller utilization of hardware • Energy consumption is turning into a major issue Is the Cloud Green? • 2005 - • More recent articles o 0.5% of total world conflicting energy usage and 1.2% o Some suggest growth is of U.S. energy usage slowing/has been come from data centers slower (Reuters, o World usage expected Koomey) to quadruple by 2020, o Some suggest it is still U.S. usage doubling increasing every 5 years (Networkworld) Green Computing • In the past 15-20 years of supercomputers o performance has doubled > 3000 times o performance per watt has doubled 300 times o performance per square foot has doubled 65 times Scaling • Dynamic Voltage and Frequency Scaling (DVFS) o Intel SpeedStep o AMD PowerNow! • Started in laptops and mobile devices • Now used in servers Green Cloud Framework
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