<div dir="ltr">I think the feature you're looking for is "Wake on LAN", <a href="http://en.wikipedia.org/wiki/Wake-on-LAN">http://en.wikipedia.org/wiki/Wake-on-LAN</a><br><br>I've wondered similar things - the small cluster I run for a students/departmental use is generally off, except when I'm teaching computational physics, or have a student interested in a specific research project. It would be nice to be able to "turn on" a few machines (from home, at 11:30pm) when I have to run something substantial. <br>
<br>If you find a good step-by-step resource describing how to do this, I'd love to hear about it.<br><br>Nathan Moore<br><br><div class="gmail_quote">On Sat, Jul 19, 2008 at 11:53 AM, Perry E. Metzger <<a href="mailto:perry@piermont.com">perry@piermont.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d"><br>
<a href="mailto:fkruggel@uci.edu">fkruggel@uci.edu</a> writes:<br>
> I am wondering whether there is any mechanism to automatically<br>
> power down nodes (e.g., ACPI S3) when idle for some time, and<br>
> automatically wake up when requested (e.g., by WOL, some cluster<br>
> scheduler, ssh). I imagine that I could cut down power & cooling<br>
> on our system by more than 50%. Any hints?<br>
<br>
</div>Depending on the motherboard, there are ways to do this. You can do<br>
wake on network and other tricks. However, if you would really save<br>
half the power, that implies that your cluster is half idle. If it is<br>
really half idle, why aren't you simply shutting half of it down?<br>
<font color="#888888"><br>
Perry<br>
</font><div><div></div><div class="Wj3C7c">_______________________________________________<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>- - - - - - - - - - - - - - - - - - - - - <br>Nathan Moore<br>Assistant Professor, Physics<br>Winona State University<br>AIM: nmoorewsu <br>- - - - - - - - - - - - - - - - - - - - -
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