'Conflict serializable schedule' diaporamas de présentation

Lecture 5: Transactions Concurrency Control

Lecture 5: Transactions Concurrency Control. Wednesday October 26 th , 2011. Announcement. HW4: posted, due on Monday. Concurrency Control. Problem: Many transactions execute concurrently Their updates to the database may interfere Scheduler = needs to schedule transactions.

1.33k views • 105 slides

Transactions

Transactions. Transaction Concept. A transaction is a unit of program execution that accesses and possibly updates various data items. A transaction must see a consistent database. During transaction execution the database may be temporarily inconsistent.

1.33k views • 101 slides

Unit III

Unit III. Chapter 14: Transactions. Chapter 14: Transactions. Transaction Concept Transaction State Concurrent Executions Serializability Recoverability Implementation of Isolation Transaction Definition in SQL Testing for Serializability. Transaction Concept.

880 views • 87 slides

Chapter 14: Transactions

Chapter 14: Transactions. Chapter 14: Transactions. Transaction Concept Transaction State Concurrent Executions Serializability Recoverability Implementation of Isolation Transaction Definition in SQL Testing for Serializability. Transaction Concept.

704 views • 53 slides

Chapter 14: Transactions

Chapter 14: Transactions. Chapter 14: Transactions. Transaction Concept Transaction State Concurrent Executions Serializability Recoverability Implementation of Isolation Transaction Definition in SQL Testing for Serializability. Transaction Concept.

536 views • 53 slides

Chapter 15: Transactions

Chapter 15: Transactions. Transaction Concept Transaction State Implementation of Atomicity and Durability Concurrent Executions Serializability Recoverability Implementation of Isolation Transaction Definition in SQL Testing for Serializability. Transaction Concept.

491 views • 48 slides

Module 17: Transactions

Module 17: Transactions. Outline. Transaction Concept Transaction State Concurrent Executions Serializability Recoverability Implementation of Isolation Transaction Definition in SQL Testing for Serializability. Transaction Concept.

418 views • 40 slides

Module 17: Transactions

Module 17: Transactions. Outline. Transaction Concept Transaction State Concurrent Executions Serializability Recoverability Implementation of Isolation Transaction Definition in SQL Testing for Serializability. Transaction Concept.

404 views • 40 slides

CS411 Database Systems

CS411 Database Systems. Kazuhiro Minami. 14: Concurrency Control. Serial Schedules. Conflict-serializable Schedules. Serializable Schedules. T/F Question. Every serializable schedule is conflict-seriaizable. Approaches for Concurrency Control. Locking

405 views • 40 slides

CS411 Database Systems

511 views • 39 slides

Lecture 7- Transactions

Advanced Databases. Lecture 7- Transactions. Masood Niazi Torshiz Islamic Azad University- Mashhad Branch www.mniazi.ir. Transactions. Transaction Concept Transaction State Concurrent Executions Serializability Recoverability Implementation of Isolation

376 views • 36 slides

CS162 Operating Systems and Systems Programming Review (II)

CS162 Operating Systems and Systems Programming Review (II). May 5, 2011 Ion Stoica http://inst.eecs.berkeley.edu/~cs162. Reliability & Flow control Transactions & two phase locking. Reliable Transfer. Retransmit missing packets Numbering of packets and ACKs Do this efficiently

484 views • 35 slides

CS162 Operating Systems and Systems Programming Review (II)

CS162 Operating Systems and Systems Programming Review (II). May 5, 2011 Ion Stoica http://inst.eecs.berkeley.edu/~cs162. Reliability & Flow control Transactions & two phase locking. Reliable Transfer. Retransmit missing packets Numbering of packets and ACKs Do this efficiently

359 views • 35 slides

Lecture 17: Concurrency Control

618 views • 34 slides

Lecture 18: Concurrency Control

348 views • 34 slides

Concurrent Transactions

347 views • 34 slides

Concurrency

Concurrency. Correctness Principle. A transaction is atomic -- all or none property. If it executes partly, an invalid state is likely to result. A transaction, may change the DB from a consistent state to another consistent state. Otherwise it is rejected (aborted).

331 views • 28 slides

CS411 Database Systems

388 views • 26 slides

Lecture 29 of 42

Lecture 29 of 42. ACID Properties and Concurrency Discussion: Term Projects. Friday, 07 November 2008 William H. Hsu Department of Computing and Information Sciences, KSU KSOL course page: http://snipurl.com/va60 Course web site: http://www.kddresearch.org/Courses/Fall-2008/CIS560

285 views • 22 slides