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Building Green Datacenters

Building Green Datacenters. Todays Overiew. Green Datacenter concept today. A typical datacenter has 1 or 2 external high voltage AC feeds. Green Datacenter concept today.

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Building Green Datacenters

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  1. Building Green Datacenters TodaysOveriew dacentec Confidential

  2. Green Datacenter concept today • A typical datacenter has 1 or 2 external high voltage AC feeds Racktivity Confidential

  3. Green Datacenter concept today • High voltage feeds are connected to trans-formers. In most of the cases, the utility company will look for efficient transformers Transformers Racktivity Confidential

  4. Green Datacenter concept today • A lot of focus in a green datacenter is on the efficiency of the UPS. Efficiency levels of 94% can be achieved. Generator set Switch Board UPS Racktivity Confidential

  5. Green Datacenter concept today • For green datacenters, the cooling technology will highly impact the PUE, free air is one of the possibility to lower the PUE. Cooling infrastructure Racktivity Confidential

  6. Green Datacenter concept today • Every efficient datacenter will use any form of hot/cold ail containment to further improve cooling efficiency Hot/Cold ail Containment Racktivity Confidential

  7. Green Datacenter concept today • PUE result 2 1,95 1,95 1,60 1,60 1,50 Racktivity Confidential

  8. Datacenters have an ineffienct power conversion methodology • Power is converted in multiple steps • High Voltage to 380V • 380V to DC for input in the UPS (batteries) • DC isagainconverted to AC sinceserverswork on AC power • Insidetheserver, the power isconvertedagainfrom AC to DC • Allthesesteps, especiallythe last step conversion perserverresults in loss of energy, up to 30%! Lossup to 30% High Voltage AC 380V AC DC via UPS 230V AC High Voltage AC Low Voltage DC dacentec Confidential

  9. Datacenters Power Usage Efficiency can be much better • Every effort is made to minimize the loss at the supply side: • Efficient transformers • Efficient UPS • Efficient Cooling • Efficient use of cold air • But what happens at the load side?: We just continue to consume the maximum of power • A green datacenter should look to optimize the supply AND load side • Most of the efficiency can be achieved at the load side Racktivity Confidential

  10. Datacenters Power Usage Efficiency can be much better • PUE = Total facility power + IT equipment power • Typical PUE = 2.0for 2.0 watts in at the utility meter, only 1 watt is delivered out to the IT load.1 • The best the industry can do at an affordable cost today = 1.5 max 33% improvement using efficient equipment and best practices.1 Utility Company • Total Facility Power • Power • Switchgear • UPS • Battery Backup • Cooling • Chillers • Air Conditioners • IT Equipment Power • Servers • Storage • Telco Equipment Power in Power in 2.000Watt 1.000Watt 1 Source GreenGirdinstitute Racktivity Confidential 10

  11. Airflow & Temperature issues • Temperature is the most difficult to control parameter in a datacenter! • Server cooling is influenced by so many parameters: air flow, air pressure, rack density, etc. that local measurements are required • Racks are never equipped with airflow & temperature sensors • Air pressure varies depending on the location in the datacenter • Airco systems embedded in raised floors need to overcool to avoid hotspots • Cooling problems at rack level are for 65% an airflow problem Racktivity Confidential

  12. Bad usage of Power supplies • Bad power supplies will generate a load on the power and consume more • Power supplies deliver good conversion when used above 80%, if they are used too often below 50%, their efficiency reduces significantly • Inefficient power supplies can damage the power supply itself and cause outages • Today, the last step to conversion is still done at the level of the server and not for the total of the rack Racktivity Confidential

  13. Only 10% of resources is used • At each time, the average datacenter is using about 10% of the sum of all storage and cpu capacities • Datacenters have at many times many idle servers that are never powered down, few servers use energy reduction functions • Servers are still linked to applications, moving workloads to concentrate processes and turn down equipment is practically not applied Racktivity Confidential

  14. What’s the Perfect Green DC We need to change our behavior, to change our behavior, we need to: • Start measuring the power (load side) in detail for every piece of equipment and this in time; • We need to shut down non used equipment; • We need to put the less important equipment at a lower power state; • We need the move virtual servers to more efficient equipment and shut down the less efficient servers at off-peak; • We need to optimize airflow in datacenters and avoid overcooling, redefine rack layouts to optimize air cooling Racktivity Confidential

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