Cisco Cisco UCS C210 M2 General-Purpose Rack Server 白書
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IT & DATA MANAGEMENT RESEARCH,
INDUSTRY ANALYSIS & CONSULTING
Data Center Management: The Key Ingredient for Reducing Server Power while Increasing Data Center Capacity
©2010 Enterprise Management Associates, Inc. All Rights Reserved. | www.enterprisemanagement.com
According to the U.S. Environmental Protection Agency (EPA), electricity consumed by servers in
U.S. data centers in 2006 represented about 1.5% of national electricity use, or around 61 billion
kilowatt-hours (kWh)—equivalent to approximately 5.8 million average U.S. households
1
and result-
ing in energy costs of approximately $5.4 billion while emitting 36 million tons of carbon dioxide
into the atmosphere.
2
Power consumption has emerged as a primary focus of many organizations that have undertaken
“Green IT” initiatives. While reducing an organization’s contributions to greenhouse gas emissions
is compelling and necessary from a corporate responsibility standpoint, an even larger impact on the
bottom line is created when a data center runs out of power. While every watt is important, the “last
watt +1,” which occurs when a data center runs out of power capacity and necessitates the build-out
or relocation of the data center, costs tens or hundreds of millions of dollars. This scenario creates a
massive stepping function and executive review, requiring data center managers to show that they have
squeezed every watt out of the company’s existing data center investment. Data center scalability has
therefore emerged as a key driver in the “greening” of the data center. Organizations are discovering
that data centers designed to provide the highest level of performance per square meter at the lowest
power levels, can derive up to 30% additional capacity from existing facilities. They also reap the PR
and cost reduction benefits of a green data center in the process. Proactive planning today can elimi-
nate or delay the necessity of expanding or relocating the data centers of tomorrow, saving millions of
dollars in the process.
“Increasing power density can lead to a situation in which companies are forced to build new data centers not because
they are running out of floor space but because they need power and cooling beyond what can be provided in their
existing data centers. This situation has driven much of the recent interest in energy-efficiency improvements for data
centers. If the power consumed (and resulting heat generated) in data centers can be reduced through energy-efficiency
measures, the existing infrastructure can continue to meet cooling and power needs, and costly investments in new
data centers can be deferred.”
Report to Congress on Server and Data Center Energy Efficiency—Public Law 109-431, United
Report to Congress on Server and Data Center Energy Efficiency—Public Law 109-431, United
States Environmental Protection Agency ENERGY STAR PROGRAM, August 2, 2007
There are two fundamental ways to reduce data center power requirements: 1) purchase energy efficient
equipment; and/or 2) employ “power-friendly” IT management technologies. The latter can reduce
power consumption on a much larger scale than simple hardware replacements. This is true only if the
data center management stack is not so complex that it causes management overhead to spiral out of
control, increasing expenditures more (and faster) than the power savings realized.
The Automated, Adaptive Data Center
Vendors created great hyperbole over the past decade, hailing the advent of a fully automated, adap-
tive, on-demand data center. In this brave new world, data center elements are grouped into generic
resource pools while an all-knowing, all-seeing management genie, sometimes known as an orchestra-
tor, manages the entire data center based on business policies. The “orchestrator” ensures that all loads
are matched with the appropriate amount of with resources, delivering maximum ROI and business
performance at the lowest cost.
1
“Report to Congress on Server and Data Center Energy Efficiency—Public Law 109-431”, United States Environmental
Protection Agency ENERGY STAR PROGRAM, August 2, 2007
2
UK National Energy Foundation Energy to Carbon Converter: