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Calculating Green IT savings: the EKT’s Virtual Infrastructure Green Meter (e-vigr)

The Ekt’s – Virtual Infrastructure Green meter (e-vigr, []) is a set of scripts for estimating, in real time, using a set of qualified assumptions, the power savings a virtualization/cloud computing infrastructure achieves when compared to an equivalent non-virtualized infrastructure.

E-vigr applies real time metering of the actual power consumption of the virtual infrastructure’s physical servers, real time load measurements from the running virtual servers and qualified assumptions, in order to estimate, in real time the following power, environmental and economic metrics:

  1. the instantaneous power consumption benefits of the virtualized infrastructure in comparison to a equivalent physical one,

  2. the cumulative energy consumption benefits of the virtualized infrastructure over a selected time period,

  3. an estimation of the monetary power savings based on public available energy cost figures,

  4. an estimation of the cumulative CO2 emissions reduction over a selected time period based on public available figures,

  5. the total power savings are estimated using a variety of PUE (Power Usage Effectiveness []) factors, or if available based on the actual’s measured datacenter’s PUE.

E-vigr can calculate power consumption savings of both XEN and VMWARE based virtual infrastructures. It requires the physical servers comprising the infrastructures to feature ILOM SNMP based power readings and it integrates nicely with Cacti for presentation purposes. The e-vigr set of scripts while not overly complicated encapsulate a set of valid and appropriate interdisciplinary assumptions in order to allow Datacenter and IT infrastructure managers to estimate and present power savings of virtualized and cloud infrastructures, thus making Green IT benefits immediately visible.

E-vigr, has being internally developed by the Hellenic National Documentation Centre (EKT/NHRF) and it is being made available as Free/Open Source Software. EKT/NHRF since 2007 has developed and operates a production grade virtualisation infrastructure that provides scientific documentation, online information and support services on research, science and technology on the Greek Academic community []. EKT/NHRF has developed e-vigr in order to monitor and assess this virtualization infrastructure benefits [] and it is built extending previous work [][] on estimating (in a static manner) the environmental and economic benefits of virtualization, especially open source. EKT/NHRF has made e-vigr available as Free Software, since it is showcase example of how an internally developed system can be augmented using external contributions and collaboration. Due to the nature of virtualized infrastructures the e-vigr tools are open-ended in order to be customized to various platforms and installations. E-vigr is currently on its first initial beta release (v0.5). Future work will aim to make the script more portable and customizeable, contributions from third parties are welcomed.

In the full paper the tool’s internals and the assumptions [],[],[] made can be discussed in greater detail, and the future work plan and opportunities for extending this set of tools in a collaborative manner will be discussed.

REFERENCES

  1. http://code.google.com/p/e-vigr/

  2. The Green Grid Data Center Power Efficiency Metrics: PUE and DCiE, available at http://www.thegreengrid.org
  3. http:www.ekt.gr, www.openaccess.gr , etc.

  4. Experience and quantitative results from the deployment of an open source production-grade virtualization platform“, available at http://helios-eie.ekt.gr/EIE/handle/10442/8140
  5. The case study of an F/OSS virtualization platform deployment and quantitative results” available at http://helios-eie.ekt.gr/EIE/handle/10442/8123
  6. Real time actual graphs from EKT/NHRFs virtualization platform available at :
  1. ITP Energy Matters: Fall 2008, Five Ways to Reduce Data Center Server Power Consumption, available at http://www1.eere.energy.gov/industry/bestpractices/energymatters/archives/fall2008.html, reprinted from The Green Grid
  2. Sun Fire Server – Power Calculator, available at http://www.sun.com/calc/servers/x64/x4150/index.html
  3. http://www.greanpeace.gr

Ομιλητές: Παναγιώτης Σταθόπουλος, Αλέξανδρος Στουμπλής (ΕΚΤ)

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