- ATOMICITY: a transaction should be done or undone completely. In the event of a failure, all operations and procedures should be undone, and all data should rollback to its previous state.
- CONSISTENCY: a transaction should transform a system from one consistent state to another consistent state.
- ISOLATION: each transaction should happen independently of other transactions occurring at the same time.
- DURABILITY: Completed transactions should remain permanent, even during system failure.
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