Lecture Database system concepts - Chapter 17: Recovery system
Lecture Database system concepts - Chapter 17: Recovery system
This chapter covers failure models and a variety of failure recovery techniques. Re-covery in a real-life database systems supporting concurrent transactions is rather complicated. To help the student understand concepts better, the chapter presents re-covery models in increasing degree of complexity. The chapter starts with a simple model for recovery, ignoring the issue of concurrency. Later, the model is extended to handle concurrent transactions with strict two-phase locking.