Tim wrote: > On Wed, 2009-08-19 at 10:35 -0400, Tom Horsley wrote: >> There are systems where it is required that live >> kernels be patchable with no downtime (things like >> space stations and nuclear reactor controllers), but >> it is fantastically complex to make work. > > I'd imagine that some of /those/ places would run dual computers in > control, and one would automatically fallover to the other. You'd need > that sort of redundancy so that you could perform repairs. > I don't know about other countries, but in the U.S., they not only have backup computers, but they have backup control rooms for reactors. (In case something happens to the main one, or its control links.) They even have duplicate control runs that take different routes. Mikkel -- Do not meddle in the affairs of dragons, for thou art crunchy and taste good with Ketchup!
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