Editing Data center (section)

===Power and cooling analysis===
[[File:Cern datacenter.jpg|thumb|300px|Data center at [[CERN]] (2010)]]
Power is the largest recurring cost to the user of a data center.<ref name=DRJ_Choosing>{{Citation|title = Choosing a Data Center|url = http://www.atlantic.net/images/pdf/choosing_a_data_center.pdf|publisher = Disaster Recovery Journal|year = 2009|author = Joe Cosmano|access-date = 2012-07-21}}{{Dead link|date=March 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>  Cooling at or below {{convert|70|F|C}} wastes money and energy.<ref name=DRJ_Choosing/> Furthermore, overcooling equipment in environments with a high relative humidity can expose equipment to a high amount of moisture that facilitates the growth of salt deposits on conductive filaments in the circuitry.<ref name=Processor>{{Citation|title=Heat Of The Moment|url=http://www.processor.com/editorial/article.asp?article=articles%2Fp2628%2F21p28%2F21p28.asp|archive-url=https://archive.today/20130131214828/http://www.processor.com/editorial/article.asp?article=articles/p2628/21p28/21p28.asp|url-status=dead|archive-date=2013-01-31|journal=Processor |volume=26 |issue=28 |date=July 9, 2004 |author=David Garrett|access-date=2012-07-21}}</ref>

A '''power and cooling analysis''', also referred to as a thermal assessment, measures the relative temperatures in specific areas as well as the capacity of the cooling systems to handle specific ambient temperatures.<ref>{{cite web|url=http://www.internetnews.com/xSP/article.php/3690651/HPs+Green+Data+Center+Portfolio+Keeps+Growing.htm|title=HP's Green Data Center Portfolio Keeps Growing |website=InternetNews |first1=David |last1=Needle |date=25 July 2007 |url-status=live |archive-url=https://web.archive.org/web/20201025201651/http://www.internetnews.com/xSP/article.php/3690651/HPs+Green+Data+Center+Portfolio+Keeps+Growing.htm |archive-date= Oct 25, 2020 }}</ref> A power and cooling analysis can help to identify hot spots, over-cooled areas that can handle greater power use density, the breakpoint of equipment loading, the effectiveness of a raised-floor strategy, and optimal equipment positioning (such as AC units) to balance temperatures across the data center. Power cooling density is a measure of how much square footage the center can cool at maximum capacity.<ref name=Inc_Howtochoose>{{Citation|title=How to Choose a Data Center|url=http://www.inc.com/guides/2010/11/how-to-choose-a-data-center_pagen_2.html|date=Nov 29, 2010 |website=Inc. |access-date=2012-07-21 |url-status=dead |archive-url=https://web.archive.org/web/20130308163559/http://www.inc.com/guides/2010/11/how-to-choose-a-data-center_pagen_2.html |archive-date= Mar 8, 2013 }}</ref> The cooling of data centers is the second largest power consumer after servers. The cooling energy varies from 10% of the total energy consumption in the most efficient data centers and goes up to 45% in standard air-cooled data centers.