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"Testing Distributed Systems w/ Deterministic Simulation" by Will Wilson

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Further reading 1

How do you turn a one-off failure into a replayable test? →Suppose an acknowledged transfer disappears during a leader change. Six engineering talks separate reproducible inputs, shrinkable operations and invariants, then ask whether the fix actually exercises the original failure.This video helps answer · Turn the incident into an input

Caption notes

FoundationDB makes randomness an input to a deterministic simulation. A failing schedule can be replayed, and separate checks look for nondeterminism inside the simulator itself.

Video or transcript source ↗
Original passages · 2
the seed of that random number generator becomes part of the input of the program
"Testing Distributed Systems w/ Deterministic Simulation" by Will Wilson · ▶ 14:18–14:28
if those don't match exactly we know there was a determinism failure
"Testing Distributed Systems w/ Deterministic Simulation" by Will Wilson · ▶ 15:22–15:30

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