Power Usage Effectiveness (PUE): Status & Directions. By K. Winkler

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Kathrin Winkler from the Green Grid, in the Data Center Summit Latin America talks about Power Usage Effectiveness

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Power Usage Effectiveness (PUE): Status & Directions. By K. Winkler

  1. 1. Power Usage Effectiveness (PUE) Status & Directions Kathrin Winkler Director, The Green Grid VP, EMC Corporation
  2. 2. Copyright © 2010, The Green Grid About The Green Grid • A not-for-profit global consortium focused on driving energy efficiency in the computing ecosystem • Developing meaningful and user-centric metrics to help IT and Facilities better manage their computing resources • Developing and promoting standards, measurement methods, best practices and technologies that support these metrics 2 2
  3. 3. Copyright © 2010, The Green Grid Why Create Metrics? Awareness • “If you can’t measure it, you can’t improve it” • Finding the hot spots Benchmarking • Continuous improvement of operations • Comparing across the industry • Improvement over time/ generation to generation • Validate claims Consistency • Common Vocabulary • Industry & Government Collaboration • Better Efficiency 3 3
  4. 4. Copyright © 2010, The Green Grid Impact of IT Power Consumption 4 Lighting power consumption 1% - 2% Server Power Consumption Impacts Power throughout the Datacenter Computer Room Air Conditioner power consumption 23% - 54% Battery Backup power consumption 6% - 13% Server, network and storage power consumption 38% - 63%
  5. 5. Copyright © 2010, The Green Grid Data Center Power Efficiency Metrics: PUE and DCiE 5 PUE = Power Usage Effectiveness = Total Facility Power IT Equipment Power 1 PUE IT Equipment Power Total Facility Power = Data Center Infrastructure Efficiency DCiE = =
  6. 6. Copyright © 2010, The Green Grid PUE Refined Total Facility Power or Energy IT Equipment Power or Energy PUE = Point of Measurement Frequency of Measurement Duration of Measurement 60Sources: The Green Grid Metrics: Data Center Infrastructure Efficiency (DCiE) Detailed Analysis (white paper #14) Usage and Public Reporting Guidelines for The Green Grid's Infrastructure Metrics PUE/DCiE (white paper #22) 6
  7. 7. Copyright © 2010, The Green Grid PUE clarifications • PUEs of < 1.0 and DCiEs of > 1.0 are *not* allowed • These elements are always ≥ 0 – Power consumed by IT equipment – Power lost in distribution – Power consumed by cooling equipment • PUE measures use within the data center, and does not include – Re-use of waste heat – Distributed power generation 77
  8. 8. Copyright © 2010, The Green Grid PUE Nomenclature Official PUE reports provide these information with subscripts appended to the metric x = Precision level of measurement (L1, L2, L3) y = Timeframe and collection frequency: PUEx,y DCiEx,y or D = Daily W = Weekly M = Monthly Y = Yearly C = Continuously 8
  9. 9. Copyright © 2010, The Green Grid Reporting Precision 9 Level 1 (Basic) Level 2 (Intermediate) Level 3 (Advanced) IT Equipment Power Measurement From… UPS PDU Server, Storage device, Router, etc. Total Facility Power Measurement From… Data Center input power Data Center input less shared HVAC Data Center input less shared HVAC plus building lighting, security, etc. Minimum Measurement Interval Monthly/ Weekly Daily Continuous
  10. 10. Copyright © 2010, The Green Grid Example Reported Results 0.45 DCiEL1,-- Single DCiE measurement (0.45) taken using a Level 1 meter placement 0.51 DCiEL1,YM Yearly average DCiE (0.51), using data points gathered monthly with a Level 1 meter placement 1.6 PUEL1,MW Monthly average PUE (1.6) using data points gathered weekly with a Level 1 meter placement 0.43DCiEL1,WD Weekly average DCiE (0.43), using data points gathered daily with a Level 1 meter placement 1.8 PUEL2,WC Weekly average PUE using data points gathered continuously with a Level 2 meter placement. 2.1 PUEL3,YC Yearly average PUE (2.1) using continuous measurements with a Level 3 meter placement. 10
  11. 11. Copyright © 2010, The Green Grid Classes of Measurement ResultsClass Description Benefit to Reporting Organization Unrecognized A publicly reported result with no claims of following TGG’s guidelines. TGG will not comment on unrecognized results. Reported A publicly reported result by the reporting organization claiming they followed TGG’s measurement recommendations and nomenclature guidelines. TGG will not comment on Reported results. Reporting organization can use standard materials from The Green Grid to explain process and results to audience. Registered A publicly reported result, with key report contextual data provided to TGG by the reporting organization to TGG’s data center performance database. Official registration of reported result. Receipt of a registration number from TGG. Link to public report data from TGG’s website. Certified A publicly reported result, with key additional data required for third-party validation or certification of results, provided to TGG by the reporting organization. All benefits applicable to registered results, plus, consideration of reported results in future TGG award or recognition programs. 11
  12. 12. Copyright © 2010, The Green Grid Putting Metrics into Global Action 12 • PUE Reporting Tool • PUE Estimator Tool • Power Configuration Efficiency Tool
  13. 13. Copyright © 2010, The Green Grid PUE Scalability Metric 13
  14. 14. Copyright © 2010, The Green Grid Partial PUE Definition • PUE = Total Facility Power divided by the IT Equipment Power • This takes into account power use within a facility • Partial PUE is for power use within a boundary • So: pPUE = Total Power within a boundary divided by the IT Equipment Power within that boundary 14
  15. 15. Copyright © 2010, The Green Grid pPUE Example 15 • PUE = 121/95 = 1.27 • pPUE of Container = 100/95 = 1.05 Chiller Transformer UPS IT Equipment 30 tons Cooling 5 kW 95 kW 15 kW 115 kW 6 kW 121 kW 100 kW Container
  16. 16. Copyright © 2010, The Green Grid Energy Reuse Factor D B+A =PUE D F-B+A =ERF Both PUE & ERF valid metrics Data Center Boundary Utility UPS PDU ICT Cool E F B A DC Absorp Chiller H G I rejected Non-DC space 16
  17. 17. Copyright © 2010, The Green Grid TGG Metrics Total Facility Power IT Equipment PowerPUE= What % of facility power is delivered to my IT equipment? How efficient is my facility in delivering power to IT equipment? IT Equipment Power Total Facility Power DCiE= How Much Work Can My IT Equipment Do, In My Facility? x 100% Useful Work Total Facility PowerDCP=
  18. 18. Copyright © 2010, The Green Grid18 Data Center Energy Productivity • Data Center Energy Productivity (DCeP) • First attempt to define useful work metric • Very comprehensive, very accurate • However, difficult to measure • Some terms require user interpretation – eg., Ui(t,T) is the utility (value) of a transaction – Subjective, could be different for each organization
  19. 19. Copyright © 2010, The Green Grid Alternative Proposal - Proxies • Proxies indicate how much work is being done without measuring work directly  Should be highly correlated to useful work  Should be easier, cheaper, faster to collect • Proxies are often used where complex measures would be impractical  eg., EPA Miles Per Gallon, marketing focus group, Dow Jones Industrial Average, or CNN Audience Reaction Meter 19
  20. 20. Copyright © 2010, The Green Grid Proxy Proposals 20 1. DCeP-based Proxies • Simplified DCeP • Productivity Link • Sample workload 2. Bits per kWH 3. CPU-based proxies • SPECint_rate • SPECpower • CUPS 4. OS images per Watt
  21. 21. Copyright © 2010, The Green Grid Proxy Shortcomings In general, the proxy proposals: • Aren’t meant for comparison between data centers  Useful for tracking progress within a data center over time  No guidelines for use and reporting, so wide variation possible • Don’t address all data center devices equally  Proposals tend to be server-centric  Storage, networking, telephony, appliances, co-processors, etc • Don’t consider the value of stored data • Don’t account for interaction between devices 21
  22. 22. Copyright © 2010, The Green Grid Where to Next? • Proxies • Currently testing IT Productivity Proxies with the US National Labs • Using instrumented applications as a control • Starting with the Intel Energy Checker SDK as a basis for instrumenting applications within the Data Center Design Guide effort • Sharing results with other organizations globally 22
  23. 23. Copyright © 2010, The Green Grid Metric Harmonization Efforts• Global Metric Harmonization  Ministry of Economy, Trade and Industry (METI)  Green IT Promotional Council (GIPC)  The U.S. Department of Energy (DOE)  The U.S. Environmental Protection Agency (EPA)  The European Union (EU)  The Green Grid (TGG) • US Industry Consensus Session  Environmental Protection Agency (EPA)  Department of Energy (DOE)  7x24 Exchange  American Socienty of Heating, Refrigerating and Air-conditioning Engineers (ASHRAE)  Silicon Valley Leadership Group (SVLG)  The Green Grid (TGG)  Uptime Institute  United States Green Building Council (USGBC) 23
  24. 24. Copyright © 2010, The Green Grid Possible New PUE Variations • M&M WG has an approved AR to review and identify if we will proceed with any further possible variations of PUE • PUE Estimated • PUE Calculated • Design PUE • Design Day PUE • Virtual PUE • …. 24
  25. 25. Copyright © 2010, The Green Grid PUE Related Information Material• Current White Papers: 1. Describing Data Center Power Efficiency 2. PUE and DCiE Efficiency Metrics 3. DCiE Detailed Analysis 4. PUE Scalability 5. Usage and Public Reporting Guidelines • Future Possible White Papers: 1. DCiE Detailed Analysis II 2. Partial PUE 3. Energy Re-use Factor & Re-use Energy Ratio 4. Possible new variations of PUE 25
  26. 26. Copyright © 2010, The Green Grid For More Information • www.thegreengrid.org for whitepapers, training, and content • For membership, please contact us: +1 503-619-0653 or admin@lists.thegreengrid.org 26 Thank you to our members for your continued dedication and involvement in ICT energy efficiency efforts!
  27. 27. Copyright © 2010, The Green Grid Thank you! For more information please go to www.thegreengrid.org

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