<html><head></head><body bgcolor="#FFFFFF"><div>I'm not sure that 1.24 counts as "poor." Especially when it's inside the ballpark of the contrary example you've cited :)</div><div><br></div><div> - mark<br><br><div><br></div></div><div><br>On 04/01/2012, at 11:22 PM, "Tony de Francesco" <<a href="mailto:tonyd@pue.com.au">tonyd@pue.com.au</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div>
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<p class="MsoNormal"><font size="2" color="black" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:black">Poor PUE at part load is an excuse for
poor design.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:black"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:black">There is no theoretical reason why PUE
should be much, if any, worse at part load compared to full load. It largely comes
down to the choice of technologies and how they are controlled.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:black"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:black">A good case in point is a 300kW (peak
capacity) data centre we are monitoring in <st1:city w:st="on"><st1:place w:st="on">Melbourne</st1:place></st1:city>. It is less than 15% full and
is still operating at a PUE of around 1.15 in winter and around 1.30 in summer.
As the load increases we are expecting the PUE to stay about the same or maybe
increase slightly.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:black"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:black">Kind Regards</span></font><font size="2" color="#0f2b5f" face="Arial"><span style="font-size:10.0pt;font-family:Arial;
color:#0F2B5F"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="3" color="#0f2b5f" face="Arial"><span style="font-size:12.0pt;font-family:Arial;color:#0F2B5F"><o:p> </o:p></span></font></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><font size="2" color="black" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:black">Tony de
Francesco<br>
Technical Director</span></font><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:black">email: <a href="mailto:tonyd@pue.com.au">tonyd@pue.com.au</a><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:black">mob: +61 (0) 457 701 179<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" color="black" face="Arial"><span style="font-size:
8.0pt;font-family:Arial;color:black">.....................................................<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="3" color="navy" face="Arial"><span style="font-size:
12.0pt;font-family:Arial;color:navy"><image001.jpg></span></font><font color="navy"><span style="color:navy"> </span></font><o:p></o:p></p>
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<p class="MsoNormal"><b><font size="2" face="Tahoma"><span lang="EN-US" style="font-size:10.0pt;font-family:Tahoma;font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span lang="EN-US" style="font-size:10.0pt;font-family:Tahoma">
<a href="mailto:ausnog-bounces@lists.ausnog.net">ausnog-bounces@lists.ausnog.net</a> [mailto:ausnog-bounces@lists.ausnog.net] <b><span style="font-weight:bold">On Behalf Of </span></b>Mark Newton<br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, 4 January 2012
11:07 PM<br>
<b><span style="font-weight:bold">To:</span></b> Phillip Grasso<br>
<b><span style="font-weight:bold">Cc:</span></b> <a href="mailto:ausnog@ausnog.net">ausnog@ausnog.net</a><br>
<b><span style="font-weight:bold">Subject:</span></b> Re: [AusNOG] Data Suburb</span></font><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"><o:p> </o:p></span></font></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><br>
On 04/01/2012, at 9:20 PM, Phillip Grasso <<a href="mailto:phillip.grasso@gmail.com">phillip.grasso@gmail.com</a>> wrote:<o:p></o:p></span></font></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span class="apple-style-span"><font size="3" face="Times New Roman"><span style="font-size:12.0pt;background:white">"</span></font></span><span class="apple-style-span"><b><font face="Arial"><span style="font-family:Arial;
background:white;font-weight:bold">The world's highest density large scale data
centers are also the most efficient!"</span></font></b></span><o:p></o:p></p>
<div>
<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt">Quoted from their site; also said they are 1.24 PUE, which compared to
ancient datacenters might be pretty efficient but I won't say they are the
"most efficient". <o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt">They aren't full yet. Efficiency always takes a hit when capacity is underutilized
during the buildout phase, but improves rapidly when installed infrastructure
starts to reach its designed "sweet spot."<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt">Give 'em another year then look again.<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"> - mark<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"><o:p> </o:p></span></font></p>
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