Revisiting the Aviation Safety vs. Networking discussion
avg at kotovnik.com
Fri Dec 25 18:17:44 CST 2009
> I can see situations in the future where people's lives could be
> dependent on networks working properly, or at least endangered if a
> network fails.
Actually it's not the future. My father's design bureau was making
hardware, since 70s (including network stuff) for running industrial
processes of a kind where software crash or a network malfunction was
usually associated with casualties. Gas pipelines, power plants, electric
grids, stuff like that.
That's a completely different class of hardware, more of a kind you'd find
in avionics - modules in triplicate, voting, pervasive error correction,
etc. Software was also designed differently, with a lot more review
processes, and with data structures designed for integrity checking (I
still use this trick in my work, which saves me a lot of grief during
debugging) and recovery from memory corruption and such.
I'd be seriously loath to put any of the current crop of COTS network
boxes into a life-critical network.
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