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Glossary Term

Last-Writer-Wins Register

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A last-writer-wins register resolves competing values using an agreed total ordering of writes, commonly timestamps plus a deterministic tie-breaker. Replicas that receive the same candidates can choose the same winning value.

The selected winner is last under that ordering and may not reflect actual real-time order when clocks differ. Concurrent values can be discarded, making this policy inappropriate when the application must preserve every edit for review or merging.

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