thermal kill switch

John Brookes johnb at
Wed Oct 23 12:01:36 PDT 2002

There's also a product from Linux Networx, called an ICE Box (Integrated
Cluster Environment, IIRC). It allows you remote: control of power;
out-of-band access; environmental monitoring.

These have been tried out at LLNL, who have a couple of open source tools
that support it (see On their first time
out in the big, bad world (when I saw them) there was the odd minor problem,
but that was before it was a 'product' (and they're on rev 2.x now I think).

Don't know how much they cost.


John Brookes
T: +44 (0)117 9155500
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E: johnb at
*Standard Disclaimer*

> -----Original Message-----
> From: Andre Lehovich [mailto:andrel at U.Arizona.EDU]
> Sent: 23 October 2002 02:02
> To: beowulf at
> Subject: thermal kill switch
> We had the air-conditioning fail yesterday.  Caught it in
> time to shut down by hand, but we won't be so lucky next
> time.  RGB's book recommends a thermal kill switch, but
> doesn't give details on implementation.  One obvious idea is
> to have a daemon monitor lm-sensors and shutdown each node
> as it gets too hot.  This is easy and cheap.
> But, is there anything better?  We have not yet had the
> electric and cooling contractors refit our server room.  Is
> there anything we should have them install during the
> rewiring?  What are the pros/cons of a room-wide kill switch
> vs. the lm-sensors approach?
> Thanks,
> --Andre
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