'Lock requests' diaporamas de présentation

Chapter 15 : Concurrency Control

Chapter 15 : Concurrency Control. Lock-Based Protocols Timestamp-Based Protocols Validation-Based Protocols Multiple Granularity Multiversion Schemes Insert and Delete Operations Concurrency in Index Structures. Chapter 15: Concurrency Control.

1.07k views • 90 slides

OpenVMS Distributed Lock Manager Performance

OpenVMS Distributed Lock Manager Performance. Session ES-09-U Keith Parris HPQ. Background. VMS system managers have traditionally looked at performance in 3 areas: CPU Memory I/O But in VMS clusters, what may appear to be an I/O bottleneck can actually be a lock-related issue. Overview.

1.19k views • 80 slides

Chapter 16 : Concurrency Control

Chapter 16 : Concurrency Control. Lock-Based Protocols Timestamp-Based Protocols Validation-Based Protocols Multiple Granularity Multiversion Schemes Insert and Delete Operations Concurrency in Index Structures. Chapter 16: Concurrency Control.

903 views • 79 slides

Chapter 16 : Concurrency Control

Chapter 16 : Concurrency Control. Version: Oct 5, 2006. Lock-Based Protocols Timestamp-Based Protocols Validation-Based Protocols Multiple Granularity Multiversion Schemes Insert and Delete Operations Concurrency in Index Structures. Chapter 16: Concurrency Control.

917 views • 79 slides

Concurrency Control

Concurrency Control. Yanlei Diao UMass Amherst March 27 and 29, 2007. Slides Courtesy of R. Ramakrishnan and J. Gehrke. Outline. Serializability & recoverability Lock management Specialized locking techniques Locking for the phantom problem Efficient B+tree locking Levels of Isolation

951 views • 75 slides

Concurrency Control

Concurrency Control. Lock-Based Protocols Timestamp-Based Protocols Validation-Based Protocols Multiple Granularity Multiversion Schemes Deadlock Handling Insert and Delete Operations Concurrency in Index Structures. Chapter 16: Concurrency Control.

1.08k views • 70 slides

Chapter 17: Concurrency Control

Chapter 17: Concurrency Control. Lock-Based Protocols Timestamp-Based Protocols Validation-Based Protocols Multiple Granularity Multiversion Schemes Insert and Delete Operations Concurrency in Index Structures. Chapter 17: Concurrency Control.

826 views • 64 slides

Carnegie Mellon Univ. Dept. of Computer Science 15-415/615 - DB Applications

694 views • 63 slides

Introduction to Database Systems CSE 444 Lectures 17-18: Concurrency Control

Introduction to Database Systems CSE 444 Lectures 17-18: Concurrency Control. November 5-7, 2007. Outline. Serial and Serializable Schedules (18.1) Conflict Serializability (18.2) Locks (18.3) Multiple lock modes (18.4) The tree protocol (18.7) Concurrency control by timestamps 18.8

684 views • 52 slides

Transactions Intro & Concurrency Control

Transactions Intro & Concurrency Control. R & G Chaps. 16/17. There are three side effects of acid. Enhanced long term memory, decreased short term memory, and I forget the third. - Timothy Leary. Concurrency Control & Recovery. Concurrency Control

660 views • 49 slides

Transaction Management and Concurrency Control

Transaction Management and Concurrency Control. Transactions. Concurrent execution of user programs is essential for good DBMS performance.

1.34k views • 45 slides

Chapter 15: Concurrency Control

Lock-Based Protocols The Two-Phase Locking Protocol #Graph-Based Protocols Deadlock Handling #Multiple Granularity. Chapter 15: Concurrency Control. A lock is a mechanism to control concurrent access to a data item Data items can be locked in two modes:

983 views • 36 slides

Lecture 17: Concurrency Control

618 views • 34 slides

Lecture 30 of 42

Lecture 30 of 42. Concurrency Discussion: Term Projects. Monday, 10 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

537 views • 30 slides

Data-oriented Transaction Execution

420 views • 28 slides

Concurrency Control

393 views • 27 slides

Concurrency Control

Concurrency Control. R&G - Chapter 17. Smile, it is the key that fits the lock of everybody's heart. Anthony J. D'Angelo, The College Blue Book. Review. ACID transaction semantics . Today: focus on Isolation property Serial schedules safe but slow

375 views • 26 slides

Concurrency Control

Concurrency Control. Lectured by, Jesmin Akhter, Assistant professor, IIT, JU. Concurrency Control. To ensure that it is, the system must control the interaction among the concurrent transactions.

425 views • 25 slides

ICS 421 Spring 2010 Transactions & Concurrency Control ( i )

ICS 421 Spring 2010 Transactions & Concurrency Control ( i ). Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. ACID Properties. 4 important properties of transactions Atomicity : all or nothing

271 views • 14 slides

Concurrency Control

Concurrency Control. Chapter 17 Sections 17.1-17.4. Conflict Serializable Schedules. Two schedules are conflict equivalent if: Involve the same actions of the same transactions Every pair of conflicting actions is ordered the same way

197 views • 13 slides