PPT-Concurrency Control Database System Implementation CSE 507

Some slides adapted from Navathe et Al Silberchatz et Al and Hector GarciaMolina Lock Based Protocols A lock is a mechanism to control concurrent access to a data item Data items can be locked in two modes . Sadhna Kumari. OUTLINE. ACID Properties. 2-Phase Commit Protocol. TPS. Serializability. Concurrency Control Protocols. Current Research. Future. References. ACID PROPERTIES. Atomicity: . A . transaction is . Seminar: Transaction Processing (Bachelor). SS 2009. Dennis . Stratmann. Outline. Goal and Overview. Examine Three Approaches to CC on RD:. 1. Predicate-Oriented Concurrency Control. 2. Relational Update Transactions. concurrency. . controll. Chapter. 13. “Distributed Systems: . Concepts and Design”. Coulouris. , . Dollimore. , Kindberg. Hanna. Björling, . Stina Fröjd & Liv Sundman. Transaction. A transaction is a point where there is interaction with the database. -. Bhavya. . Kilari. Dr. . Yanqing. Zhang, . CSc. 8320. PREVIEW. P. ART. I. : . I. NTRODUCTION. Transaction Processing System. [. R. Chow & T. Johnson, 1997. Government Finance Officers Association. 8/19/2014. K. Adam Glover, CISA. Professional Involvement:. Information Systems Audit and Control Association (ISACA). Florida Government Finance Officers Association (FGFOA). - bio-inspired massively-parallel architectures. Steve Furber. The University of Manchester. steve.furber@manchester.ac.uk. SBF is supported by a Royal Society-. Wolfson. Research Merit Award. Andrew Brown. Database System Implementation CSE 507. Some slides adapted from . Navathe. et. Al. and . Silberchatz. et. Al. . Transaction Concept. A . transaction. . is a . unit . of program execution that accesses and possibly updates various data items.. Database Concurrency Control. 1 Purpose of Concurrency Control. To enforce Isolation (through mutual exclusion) among conflicting transactions. . To preserve database consistency through consistency preserving execution of transactions.. in SDD-1. Philip A. Bernstein. Microsoft Research. SDD-1. A DARPA-funded research project at Computer Corporation of America (Cambridge, MA) to build a distributed database system. Started in the fall of 1976. ) Implementation Plan Development. . John McLeod. VA Dept. of . Environmental Quality. February 12, 2014. Chuckatuck and Brewers Creeks Watersheds. Isle of Wight County and City of Suffolk. The TMDL Process: 3 Steps. Modern Database Management. 12. th. Edition. Jeff Hoffer, Ramesh . Venkataraman. , . Heikki. . Topi. . Objectives / . Self-study outline. Define . terms (Slides #3-6). Name limitations of conventional file . Sadhna Kumari. OUTLINE. ACID Properties. 2-Phase Commit Protocol. TPS. Serializability. Concurrency Control Protocols. Current Research. Future. References. ACID PROPERTIES. Atomicity: . A . transaction is . -. Bhavya. . Kilari. Dr. . Yanqing. Zhang, . CSc. 8320. PREVIEW. P. ART. I. : . I. NTRODUCTION. Transaction Processing System [. R. Chow & T. Johnson, 1997. Some slides adapted from . Navathe. et. Al. . Introduction to Database Security. Threats to databases. Loss of . integrity. Loss of . availability. Loss of . confidentiality. . To protect databases against these types of threats four kinds of countermeasures can be implemented:.