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August 2015
September 2015

2015-08-04 »

System A has problems, where it will fail deterministically in a random 10% subset of cases.

System B has different problems, where it will fail deterministically in a different random 10% subset of cases.

Assuming the problems in each system are independent, the chance that a particular failure mode affects both system A and system B is only 10%*10% = 1%.  Thus, the chance that a problem which occurs in system A, is gone when you switch to system B, is about 90%.

And that's why replacing your broken wifi router with a different wifi router usually makes your problem go away.

I'm CEO at Tailscale, where we make network problems disappear.

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