'Overwriting uncommitted data' presentation slideshows

CS4432: Database Systems II

640 views • 55 slides

COP4710 Database Systems

COP4710 Database Systems. Transaction Management. Fall 2013. Users and Database Programs. End users don't see the Database directly Are only vaguely aware of its design May be acutely aware of part of its contents SQL is not a suitable end-user interface

547 views • 42 slides

Concurrency Control

Concurrency Control. Transactions. A transaction is a list of actions. The actions are reads (written R T (O)) and writes (written W T (O)) of database objects. Example: T 1 : R(V), R(Y), W(V), W(C). Schedules.

636 views • 26 slides

Transaction Management Overview

Transaction Management Overview. Chapter 16. Transactions. Concurrent execution of user programs is essential for good DBMS performance. Because disk accesses are frequent, and relatively slow, it is important to keep the cpu humming by working on several user programs concurrently.

307 views • 14 slides