I think the feature you're looking for is "Wake on LAN", http://en.wikipedia.org/wiki/Wake-on-LAN
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. If you find a good step-by-step resource describing how to do this, I'd love to hear about it. Nathan Moore On Sat, Jul 19, 2008 at 11:53 AM, Perry E. Metzger <[EMAIL PROTECTED]> wrote: > > [EMAIL PROTECTED] writes: > > I am wondering whether there is any mechanism to automatically > > power down nodes (e.g., ACPI S3) when idle for some time, and > > automatically wake up when requested (e.g., by WOL, some cluster > > scheduler, ssh). I imagine that I could cut down power & cooling > > on our system by more than 50%. Any hints? > > Depending on the motherboard, there are ways to do this. You can do > wake on network and other tricks. However, if you would really save > half the power, that implies that your cluster is half idle. If it is > really half idle, why aren't you simply shutting half of it down? > > Perry > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > -- - - - - - - - - - - - - - - - - - - - - - Nathan Moore Assistant Professor, Physics Winona State University AIM: nmoorewsu - - - - - - - - - - - - - - - - - - - - -
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