conflict serializability

What Is The Purpose Of Two-phase Locking?

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What Is The Purpose Of Two-phase Locking? In databases and transaction processing, two-phase locking (2PL) is a concurrency control method that guarantees serializability. It is also the name of the resulting set of database transaction schedules (histories). What is rigorous phase locking? Rigorous 2-PL – This requires that in addition to the lock being 2-Phase

Can Conflict Serializable Contain Cycle?

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Can Conflict Serializable Contain Cycle? A schedule S is conflict-serializable iff: The corresponding precedence graph of schedule S does not contain any cycles. How many number of conflict serializable schedules are possible for the below schedule s? Clearly, there exists a cycle in the precedence graph. Therefore, the given schedule S is not conflict serializable.