GuestLec02 - Green Computing David Irwin Dept of Computer...

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1 Green Computing David Irwin Dept of Computer Science UMass Amherst What is Green Computing? Greening of computing Sustainable IT How to design energy-efficient hardware, software and systems? Computing for Greening Use of IT to make physical infrastructure efficient? Homes, offices, buildings, transportation
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2 Some History Energy-efficient mobile devices a long standing problem Motivation: better battery life, not green Recent growth of data centers More energy-efficient server design Motivation: lower electricity bills Green systems, lower carbon footprint Computing and Power Consumption Energy to Compute 20% power usage in office buildings 50%-80% at a large college 3% of our carbon footprint and growing Data centers are a large fraction of the IT carbon footprint PCs, mobile devices also a significant part
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3 What is a data center? Facility for housing a large number of servers and data storage Google data center (Dalles, OR) 12 football fields in size Compare to box stores! 100 MW of power Enough for a small city ~ 100K servers Data Center Energy Costs
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4 Energy Bill of a Google Data center Assume 100,000 servers Monthly cost of 1 server 500W server Cost=(Watts X Hours / 1000) * cost per KWH Always-on server monthly cost = $50 Monthly bill for 100K servers = $5M
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This note was uploaded on 11/22/2011 for the course COMPSCI 677 taught by Professor Shenoy during the Spring '08 term at UMass (Amherst).

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GuestLec02 - Green Computing David Irwin Dept of Computer...

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