Data Center Server Rack Strategies
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Enclosure Strategies for Efficiency – Data Center Efficiency Best-Practice Starts with Your Racks Historically, Data Center managers didn't invest much thought in their deployment of server racks beyond basic functionality, air flow, and the initial cost of the rack itself. Today, the widespread deployment of high-density configurations is causing major hot spot concerns and capacity issues. These factors, along with the high cost of power, require a sound understanding of how your server rack deployment plan relates to your overall efficiency strategy. To view the recorded webinar presentation, please visit http://www.42u.com/enclosure-strategies-webinar.htm
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Data Center Server Rack Strategies
- 1. 42U Confidential ©2008 42U All rights reserved Slide Enclosure Strategies for Efficiency – Data Center Efficiency Best-Practice Starts with Your Racks September 5, 2008 ________________________________
- 5. Energy Cost Projection 42U Confidential ©2008 42U All rights reserved Slide Source: Uptime Institute
- 21. Q&A 42U Confidential ©2008 42U All rights reserved Slide For More Information Contact Your 42U Data Center Efficiency Consultant: 1-800-638-2638 or www.42U.com For a Copy of Today’s Presentation Email: [email_address] Please Type Your Questions In The Chat Window Thank You
Editor's Notes
- Create a roadmap Ensuring you’re not exposed to SLA failures??? Ensuring compliance with your ITIL compliance in areas such as supplying appropriate capacities, as opposed to sufficient capacities. More deeply, business analysis best practices, as defined in the Business Analysis Body of Knowledge (BABOK), define the techniques and ITIL v3 where the focus is on the life cycle approach. Ineffective business analysis costs U.S. businesses at least $30B every year. Improving the precision of the Total Cost of Ownership calculation to be used for informed planning. Identifying stranded capacities that are opportunities for efficiency improvement programs.
- The A and B projections are for improvements in server technology efficiency.
- Without moving to newer technologies and best practices, data center density will reach physics limits
- Perforated enclosures are best for maximum air flow if the primary method of cooling in your datacenter or server room will be ambient air cooling (fans, air handlers, blowers, and/or Computer Room Air Conditioning (CRAC) units and a raised floor).
- Use thermostatically controlled variable-speed fans In some situations, a 3-phase power distribution strategy can be preferable because it reduces PDU requirements and increases open space in racks. Lower cost of cabling: Loads > 5kW within a rack can be handled by a single 3-ph circuit as against multiple 1-ph circuits, translates into lower cost of cabling. • Higher reliability of electrical infrastructure: Bringing 3-phase power into the rack and utilizing rackmount PDUs with phase level metering capabilities allows data center operators to better balance the loads across all three phases. Balanced loads minimize harmonics and overheated neutral wires. • Higher reliability of IT infrastructure: Bringing a lower number of circuits into each rack maximizes the airflow both under the raised floor and within the racks. Better airflow keeps IT equipment from overheating. • Scalability: Higher capacity of 3-ph circuits provides more room for growth in the future. More equipment can be plugged in without bringing down power to existing equipment. If a data center operator chooses to use 3-ph power for some or all the racks, the next decision point is whether to bring in a Wye-supply or a delta supply to the rack. Wye supply would also pull in a neutral wire to the rack whereas a delta supply would not. Develop modular rack design point for low-, medium- and high-density rack configurations. The most significant efficiency strategy is simple airflow control; ensuring correct airflow by using blanking panels and floor grommets to ensure proper airflow. The next level of airflow control is containment.
- effect of adding one 12”, 7U blanking panel to the middle of a rack conventional wisdom is correct: blanking panes are essential other data center clichés also borne out eliminate leaks in floor manage floor tile permeability
- Feedback on floor-tile tuning: with instrumentation, we can observe results in real time when airflow is restricted, under-floor pressure increases rack-top temperatures decrease without monitoring and visualization, this process is guesswork how many tiles to remove?
- At all rack design points hot/cold aisle configurations will be more efficient Depending on the number of high-density racks, those operating at 10 kW of load or higher, you should consider either high-density checkerboarding or close-coupled cooling. TIA 492?
- Planning is everything and best-practices make the difference. Planning data center layouts is critical. It’s becoming common to find data centers laid out with a hot/cold aisle configuration. Closing up the airflow gaps is another step in the right direction. Better yet is isolation of the hot and cold aisles. Here are two diagrams from an Accenture study done in conjunction with Lawrence Berkeley National Lab and the Silicon Valley Leadership Group. They examined two isolation alternatives; hot aisle isolation and cold aisle isolation. The results of the study indicated that cold aisle isolation is the more efficient of the two. The report then highlighted the efficiency gains of cold aisle isolation. Three findings seem to be most significant relative to efficiency; the dramatic reduction in fan energy translated to a 1.8% overall energy reduction and raising the chilled water temperature to 50 degrees, coupled with a water-side economizer, reduced overall energy consumption an additional 2.8%. While difficult to calculate in terms of efficiency, the 30-49% increase in CRAH capacity is clearly significant, particularly for those of you who are reaching your CRAH and CRAC capacity limits. Cold aisle isolation provided additional savings in other areas as well. You can get to a copy of the full report from our website at 42U.com.
- Get electrical, mechanical studies Find engineering firms with data center experience Consider instrumenting your data center to enhance visibility Eat your spinach (blanking panels, leaks) Take advantage of outstanding, free PG&E Pacific Energy Center classes (state-wide) Keep an eye on emerging technologies (flywheel UPS, rack-level cooling)