Re: What is the limit? (was RE: multi-homing fixes)

[Gordon Cook <cook () cookreport com>]

> 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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