Slide 1 cs4432recovery1 CS4432: Database Systems II Lecture #20 Failure Recovery Professor Elke A. Rundensteiner Slide 2 cs4432recovery2 Transaction: a collection of actions…

Slide 1 1 Recovery Control (Chapter 17) Redo Logging CS4432: Database Systems II Slide 2 Disadvantage of Undo Logging This forces the DBMS to make many I/Os –Especially…

Recovery Integrity or correctness of data Would like data to be “accurate” or “correct” at all times EMP Name White Green Gray Age 52 3421 1 Integrity or consistency…

Recovery Integrity or correctness of data Would like data to be “accurate” or “correct” at all times EMP Name White Green Gray Age 52 3421 1 Integrity or consistency…

Recovery Integrity or correctness of data Would like data to be “accurate” or “correct” at all times EMP Name White Green Gray Age 52 3421 1 Integrity or consistency…