Consider three transactions T1, T2, T3 and two data iterns X, Y T1: R (X); R(Y); W (Y) T2: R (X); W (X) T3: R(Y); R (X); W (X) Given the following schedule of interleaved operations from T1, T2, and T3 S: R1 (X); R3 (Y); R3 (X); R1 (Y); R2 (X); W1 (Y); Al; W2 (X); C2; W3 (X); C3 "A1" means transaction T1 aborts; "C2" (resp. "C3") means transaction 12 (resp. T3) commits (1) What anomalies occur in this schedule? Explain your answer (2) protocol. (3) For each transaction T1, T2, T3, insert all the lock and unlock operations to make the transaction satisfy the strict 2PL protocol. (Note: You can add a write lock directly if the transaction needs to both read and write a data item) Two-Phase Locking (2PL) is widely used for concurrency control in relational database systems. Briefly describe the strict 2PL

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Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.