Stratus: Servers that won’t quit – The 24 year running computer

Re:Stratus: Servers that won’t quit – The 24 year running co... by ams6110 on Sunday January 29, 2017 @09:48PM (#13518300)

Also I think the processors ran different, independently developed software, the idea being that it would be unlikely for independent codebases to have the same bugs.

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Re:Stratus: Servers that won’t quit – The 24 year running co... by sitharus on Sunday January 29, 2017 @11:41PM (#13518734)

The four main CPUs ran the same Primary Flight Software. There was a separate backup computer running the Backup Flight Software, which was developed by an independant team, to take over if the PFS failed.

There's a bit of debate as to what would have happened if it ever took over.

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Re:Stratus: Servers that won’t quit – The 24 year running co... by jackvalentine on Monday January 30, 2017 @02:45AM (#13519326)

I expect they did know, but it'd be an interesting exercise to not tell either development team if they were writing the "real" or the "backup" software, and just swap them around to keep people on their toes.

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