[41140] in North American Network Operators' Group
Re: What is the limit? (was RE: multi-homing fixes)
daemon@ATHENA.MIT.EDU (Gordon Cook)
Thu Aug 30 00:20:25 2001
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Date: Thu, 30 Aug 2001 00:09:35 -0400
To: Alex Rubenstein <alex@nac.net>
From: Gordon Cook <cook@cookreport.com>
Cc: "nanog@merit.edu" <nanog@merit.edu>
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>I recall something about liquid (something, could be nitrogen, or perhaps
>even mercury) that was chilled; PC Boards were then submersed in the
>liquid to keep cool.
>
>Maybe on Crays?
>
dunno about Crays..... but definitely on Control Datas ETA 10s
designed to replace the CYBER 205
in 1988-1990 at the von Nueman supercomputer center in princeton we
had 2 eta 10s.... each with large CPU boards that were immersed in
tanks of liquid nitrogen. If we had a AC problem the operator were
trained to do the quickest possible shut down on the machines.....
even so with in five minutes the temp inside the machine room went up
by 10 degrees
--
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