DBMS U4 (PQP) ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ➔ ACID (*,* ) [3] Transaction states (*) [2] Validation based protocol (*,*) [3] Multiple Granularity (*,*,*) [4] Remote backup system (*,*,*,* ) [5] Determining if schedule is serializable ARIES (*,*,*,*) [5] Timestamp based protocol for serializability (*,*conservative ,*,*,*,*,*,*,*) [10] Log based recovery (*,*) [3] Sertializabitly (*conflict,) [2] Lock based protocols (* problems ,*) [3] 2PL (*rigorous 2pl,*strict 2pl and its disadvantages) [3] Shadow paging (* 2020,) [2] Schedules (Recoverable ,cascadeless,*serial and non serial ) [2] Concurrency control ( problems ,*,*) [3] Transaction rollback ,commit,save point(*) [2] Deadlock Buffer Management Optimistic concurrency control