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
Replica lag experiment
Write a value and compare primary and delayed replica reads.
Predict it. Test it. Change one thing.
Local educational model. No account or cloud charges. Nothing is deployed to AWS.
A delayed replica can return an older value. This latest-value model does not simulate consensus, conflict resolution or DynamoDB APIs. Its manually chosen lag is not an AWS guarantee.
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