Try this learning loop
State a prediction before changing the controls. Identify which assumption changes the result, reset and test a second case. These deliberately small models explain one mechanism at a time.
Interactive concept model
Failure domain experiment
Take one zone offline and inspect remaining capacity.
Predict it. Test it. Change one thing.
Local educational model. No account or cloud charges. Nothing is deployed to AWS.
Two independent zones, equal static capacity and immediate traffic redistribution are assumed. Real failover includes detection, connection recovery, data state and dependencies. This is a failure-domain capacity experiment, not a database implementation.
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