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GCN : November 2013
36 CDWG.com | 800.808.4239 COVER STORY temperature by 5 degrees Fahrenheit can reduce energy consumption by 5 percent, yielding a savings of 25kW. at might be enough to support near- term growth or transition to more energy- efficient servers and storage. In general, one BTU of heat is generated from 0.293W of energy; on average, 3.516kW of energy (or 12,000 BTU) requires 1 ton of cooling (cooling capacity is measured in tons). Acknowledging the Ins and Outs of Consolidation Data centers increasingly seek to virtualize technology and techniques to help mediate these issues. rough virtualization, servers and storage resources can be consolidated in many environments, boosting resource utilization and containing costs. ere is a growing focus on power, cooling, floor space and environmental (PCFE) requirements. Consolidating servers, storage, networking and facilities are popular and justifiable uses of virtualization. Yet, consolidation by itself deals only with those servers and applications that lend themselves to being consolidated. It does not optimize applications that need to scale beyond the limits of a single or even multiple servers. In addition, deployment of new generation, faster and more energy-efficient equipment can help to address PCFE issues. T he increasing density of IT equipment needed to sustain organizational growth and support new applications, capabilities and services has resulted in an array of tough power and cooling challenges for data center managers. Moreover, power consumption per footprint varies widely by operational focus and type of application; the ratio of servers to storage; the amount of online active storage compared with nearline or static and inactive data; and networking bandwidth. For instance, a compute- intensive video rendering, modeling or simulation-based environment might have a high ratio of servers to storage; an online hosting environment might have an even balance of servers and storage; and a fixed or static content provider or managed backup service might have a high ratio of storage to servers. While occupying less physical space within a cabinet, rack or blade center, each successive generation of technology has tended to provide an increase in net processing or compute power along with a boost in memory and input/output operations per second (IOPS) capabilities. With heating and cooling accounting for up to half of all electrical power consumed in some data centers, any improvement in airflow and cooling will have a positive impact. For example, if 500kW are being used to cool a data center, raising the room HEA T IS ON, WHEN THE THE REDUCTION IN OPERATING EXPENSES THROUGH ENERGY SAVINGS FROM AN EFFICIENT DATA CENTER SOURCE: Gartner 20%