Distributed Systems Consistency & Replication Alberto Montresor University of Trento, Italy 2011/11/02 Redundancy is our main avenue of survival Robert Silverberg, “Shadrach…

Optimistic Methods for Concurrency Control By : H.T. Kung & John T. Robinson Presenters: Munawer Saeed What is Concurrency Control Process of managing simultaneous execution…

Slide 1 1 Lecture 5: TM – Lazy Implementations Topics: TM design (TCC) with lazy conflict detection and lazy versioning, intro to eager conflict detection Slide 2 2 Design…

Isolation Concepts Adapted from slides by J. Gray & A. Reuter Chapter 7 in Gray and Reuter Why Lock? Give each transaction the illusion that there are no concurrent updates…

Isolation Concepts Adapted from slides by J. Gray & A. Reuter Chapter 7 in Gray and Reuter Why Lock? Give each transaction the illusion that there are no concurrent updates…

Concurrency Control Single User Versus Multi-user System: Database system can be classified on the basis of the number of users who can use the system concurrently. A DBMS…