Kill the power faster than poweroff?

Donald Becker becker at
Fri Sep 12 17:50:35 EDT 2003

On Fri, 12 Sep 2003, Mark Hahn wrote:
> > I'm a big fan of network IPMI 1.5, which is usually implemented by a
> > Baseboard Management Controller (BMC).  The BMC is a microcontroller
> > running on stand-by power.  It can control power, redirect the "serial"
> IPMI and BMC are attractive, but as far as I can tell, completely
> non-viable for moderately-priced nodes.  I mean, if my 1-u dual costs
> $US 2k, adding a BMC probably means a 35-50% boost in price.

I wouldn't be a big fan if either
   it was too expensive to be common
   it was proprietary 

I've seen quotes for around $30 extra when bundled with the system
board.  Of course finding a BMC daughterboard later is difficult
and likely expensive, so you have to specify it with the system.

> or are there cheap BMC options?  otherwise, it seems like a holdover
> from the world of "enterprise" gold-plated servers, where $1k on a 
> $50K server is in the noise...

And you thought the option 

Donald Becker				becker at
Scyld Computing Corporation
914 Bay Ridge Road, Suite 220		Scyld Beowulf cluster system
Annapolis MD 21403			410-990-9993

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