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    <div class="moz-cite-prefix">You're not completely off the mark, but
      you are a bit off. Speaking from what I know of the national HPC
      resources&nbsp; in the US (ALCF, OLCF, XSEDE), to get on the largest
      systems you usually have to go through an application process that
      shows your programs can scale well enough to use these large
      supercomputers, and the schedulers are usually configured to give
      preference to larger jobs. <br>
      <br>
      So while it might be true that these systems are seldom used to
      run a single job across every single node and processor, efforts
      are made to keep out the poseurs and reward those who do use large
      portions of the cluster for a single job. In other words, I think
      your off by a matter of degree. I think a "small" job on systems
      like this is probably a few thousand or tens of thousands of
      cores. <br>
      <br>
      Hopefully someone from ALCF, OLCF, XSEDE or some other large HPC
      center can chime in with more detailed information. <br>
      <br>
      Prentice<br>
      <br>
      <br>
      <br>
      On 06/05/2013 11:48 PM, Nathan Moore wrote:<br>
    </div>
    <blockquote
cite="mid:CACD67swUjP-a4BUdhwj3LBc-VQsbX=B05bA2Gj7iA-tCOQaR4A@mail.gmail.com"
      type="cite">I didn't mean any special insult to the latest top 500
      entry. Rather, that was a comment on the general nature of that
      list. &nbsp;Does anyone know, off-hand, how often these big machines
      run with all compute nodes dedicated to a single message-passing
      job? &nbsp;My guess is less than 1% of the time, and for the most part
      these machines are used as batch servers for smaller (N=512, 64,
      32, etc) Amber/Gaussian/CFD like jobs.
      <div>
        <div><br>
        </div>
        <div>Am I far off the mark?</div>
        <div><br>
        </div>
        <div>Along similar lines, has Google or Amazon ever published
          their batch job capacity (it must be in petaflops...)<br>
        </div>
        <div><br>
        </div>
        <div>NT<br>
          <br>
          <div class="gmail_quote">
            On Tue, Jun 4, 2013 at 12:36 AM, Lux, Jim (337C) <span
              dir="ltr">&lt;<a moz-do-not-send="true"
                href="mailto:james.p.lux@jpl.nasa.gov" target="_blank">james.p.lux@jpl.nasa.gov</a>&gt;</span>
            wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
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style="font-size:14px;font-family:Calibri,sans-serif;word-wrap:break-word">
                <div>
                  <div>
                    <div>And on SlashDot</div>
                    <div><a moz-do-not-send="true"
href="http://tech.slashdot.org/story/13/06/03/1231256/full-details-uncovered-on-chinese-tianhe-2-supercomputer"
                        target="_blank">http://tech.slashdot.org/story/13/06/03/1231256/full-details-uncovered-on-chinese-tianhe-2-supercomputer</a></div>
                    <div><br>
                    </div>
                    <div>If you want to read a lot of comments from
                      people who don't really know HPC</div>
                    <div>
                      <div>
                        <p class="MsoNormal"
style="margin-top:0in;margin-right:0in;margin-left:0in;margin-bottom:0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">&nbsp;</p>
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                  <div style="border-right:medium
                    none;padding-right:0in;padding-left:0in;padding-top:3pt;text-align:left;font-size:11pt;border-bottom:medium
                    none;font-family:Calibri;border-top:#b5c4df 1pt
                    solid;padding-bottom:0in;border-left:medium none">
                    <span style="font-weight:bold">From: </span>Nathan
                    Moore &lt;<a moz-do-not-send="true"
                      href="mailto:ntmoore@gmail.com" target="_blank">ntmoore@gmail.com</a>&gt;<br>
                    <span style="font-weight:bold">Date: </span>Monday,
                    June 3, 2013 9:55 AM<br>
                    <span style="font-weight:bold">To: </span>Christopher
                    Samuel &lt;<a moz-do-not-send="true"
                      href="mailto:samuel@unimelb.edu.au"
                      target="_blank">samuel@unimelb.edu.au</a>&gt;, "<a
                      moz-do-not-send="true"
                      href="mailto:beowulf@beowulf.org" target="_blank">beowulf@beowulf.org</a>"
                    &lt;<a moz-do-not-send="true"
                      href="mailto:beowulf@beowulf.org" target="_blank">beowulf@beowulf.org</a>&gt;<br>
                    <span style="font-weight:bold">Subject: </span>Re:
                    [Beowulf] China to eclipse Titan with 48,000 Intel
                    MICs?<br>
                  </div>
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                    <div class="h5">
                      <div><br>
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                      <div>
                        <div>Congratulations on making the world's
                          largest space-heater...
                          <div><br>
                            <br>
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