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Guarantees serializability by acquiring all locks before any are released. Use for maintaining transaction consistency.

Assigns timestamps to ensure transactions are processed in a certain order. Use to avoid serialization anomalies.

Ensures transactions execute with the same effect as if they were executed serially. Use when absolute consistency is necessary.

Locks data when a transaction begins to prevent concurrent modifications. Use when high contention is expected.

Allows reading only committed data, preventing dirty reads. Use this in databases where reading uncommitted data is not acceptable.

Allows transactions to lock resources at various levels of granularity. Use for efficiency when transactions need various types of access to data.

Algorithm to identify deadlocks. Use when deadlock prevention is not feasible or practical.