http://www.datacenterknowledge.com/archives/2009/07/20/googles-pue-numbers-slip-slightly/ News and analysis about data centers, cloud computing, managed hosting and disaster recovery Mon, 13 Feb 2012 17:24:17 +0000 hourly 1 http://wordpress.org/?v= http://www.datacenterknowledge.com/archives/2009/07/20/googles-pue-numbers-slip-slightly/comment-page-1/#comment-5614 上下する Google の PUE 値 « Agile Cat — Azure & Cloud — Talking Book Mon, 24 Aug 2009 22:42:30 +0000 http://www.datacenterknowledge.com/?p=13229#comment-5614 [...] Data Center Knowledge より July 20th, 2009 : Rich Miller From <http://www.datacenterknowledge.com/archives/2009/07/20/googles-pue-numbers-slip-slightly/> [...] [...] Data Center Knowledge より July 20th, 2009 : Rich Miller From <http://www.datacenterknowledge.com/archives/2009/07/20/googles-pue-numbers-slip-slightly/&gt; [...]

]]> http://www.datacenterknowledge.com/archives/2009/07/20/googles-pue-numbers-slip-slightly/comment-page-1/#comment-4966 Dave Clark Mon, 20 Jul 2009 19:41:40 +0000 http://www.datacenterknowledge.com/?p=13229#comment-4966 These recent increases in PUE may be due to fewer free cooling hours as the weather warms up in the Northern Hemisphere. Most of the graphs of PUE over time that I've seen include seasonal variation - the PUE get's better in the in winter and worse in the summer, even if the long term trend is lower. Data Centers with low PUE metrics would tend to be especially sensitive to the addition of any mechanical cooling and the associated increase in Total Facility Power. These recent increases in PUE may be due to fewer free cooling hours as the weather warms up in the Northern Hemisphere. Most of the graphs of PUE over time that I’ve seen include seasonal variation – the PUE get’s better in the in winter and worse in the summer, even if the long term trend is lower. Data Centers with low PUE metrics would tend to be especially sensitive to the addition of any mechanical cooling and the associated increase in Total Facility Power.

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