18.3 Test Questions By Donavon M. Norwood 03/04/2009.

Slides:



Advertisements
Similar presentations
Concurrency Control WXES 2103 Database. Content Concurrency Problems Concurrency Control Concurrency Control Approaches.
Advertisements

Fan Qi Database Lab 1, com1 #01-08 CS3223 Tutorial 10.
Concurrency Control Enforcing Serializability by Locks
Managing Hierarchies of Database Elements (18.6) 1 Presented by Sarat Dasika (114) February 16, 2012.
1 ICS 214B: Transaction Processing and Distributed Data Management Lecture 6: Cascading Rollbacks, Deadlocks, and Long Transactions Professor Chen Li.
CS4432: Database Systems II Lecture #26 Concurrency Control and Recovery Professor Elke A. Rundensteiner.
Avishai Wool lecture Introduction to Systems Programming Lecture 5 Deadlocks.
Prepared by: Mudra Patel (113) Locking Scheduler & Managing Hierarchies of Database Elements.
Enforcing Serializability By LOCKS
ICS 421 Spring 2010 Transactions & Concurrency Control (i) Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa.
Concurrency Control A.Sri Harsha Enforcing Serializability of Locks.
Managing Hierarchies of Database Elements (18.6) -Neha Saxena Class Id: 214.
Concurrency Control Managing Hierarchies of Database Elements (18.6) 1 Presented by Ronak Shah (214) March 9, 2009.
Concurrency III (Timestamps). Serializability Via Timestamps (Continued) Every DB element X has two timestamps: 1. RT (X) = highest timestamp of a transaction.
DBMS Functions Data, Storage, Retrieval, and Update
Concurrency. Correctness Principle A transaction is atomic -- all or none property. If it executes partly, an invalid state is likely to result. A transaction,
Concurrency Control Chapter 18 Section 18.5 Presented by Khadke, Suvarna CS 257 (Section II) Id
Chapter 18.5 An Architecture For A Locking Scheduler Steve Ikeoka ID: 113 CS 257 – Spring 2008.
1 IT420: Database Management and Organization Transactions 31 March 2006 Adina Crăiniceanu
1 Transaction Management Overview Chapter Transactions  Concurrent execution of user programs is essential for good DBMS performance.  Because.
Database Management Systems, 2 nd Edition. R. Ramakrishnan and J. Gehrke1 Transaction Management Overview Chapter 18.
1 Transactions BUAD/American University Transactions.
Database Management Systems, 2 nd Edition. R. Ramakrishnan and J. Gehrke1 Transaction Management Overview Lecture 21 Ramakrishnan - Chapter 18.
Database Systems/COMP4910/Spring05/Melikyan1 Transaction Management Overview Unit 2 Chapter 16.
1 Transaction Management Overview Chapter Transactions  Concurrent execution of user programs is essential for good DBMS performance.  Because.
CMPT 354, Simon Fraser University, Fall 2008, Martin Ester 136 Database Systems I SQL Modifications and Transactions.
Dr Gordon Russell, Napier University M/C Walkthrough - V2.0 1 Multi-Choice Walkthrough.
Transaction Management and Recovery, 2 nd Edition. R. Ramakrishnan and J. Gehrke1 Transaction Management Overview Chapter 18.
1 Database Systems ( 資料庫系統 ) December 27/28, 2006 Lecture 13 Merry Christmas & New Year.
Prepared by: Mudra Patel (113) Pradhyuman Raol(114) Locking Scheduler & Managing Hierarchies of Database Elements.
DBMS Deadlock.
CS 245: Database System Principles Notes 10: More TP
SAP ECC 6.0 DEVELOPMENT ABAP ABAP DICTIONARY & Advanced Editor Abap
Concurrency Control Managing Hierarchies of Database Elements (18.6)
SQL – Transactions in SQLite
Transaction Management and Concurrency Control
Transaction Management Overview
CS216: Data-Intensive Computing Systems
Database Systems (資料庫系統)
CS 257: Principles of Database System
Enforcing Serializability by Locks
Transaction Management Overview
OpenWorld How to Prepare Data from Business Intelligence Cloud Service
Locking Systems with Several Lock Modes
18.5 An Architecture for a Locking Scheduler
By Donavon Norwood Ankit Patel 112 Aniket Mulye 111
18.5 An Architecture for Locking Scheduler
Transaction Management Overview
March 9th – Transactions
Section 18.8 : Concurrency Control – Timestamps -CS 257, Rahul Dalal - SJSUID: Edited by: Sri Alluri (313)
CS 245: Database System Principles Notes 10: More TP
Locks and Locking Mode ( )
Lecture 21: Concurrency & Locking
Concurrency Control WXES 2103 Database.
ENFORCING SERIALIZABILITY BY LOCKS
Lecture 21: Intro to Transactions & Logging III
Lecture 22: Intro to Transactions & Logging IV
CPSC-608 Database Systems
SQL – Shared and Exclusive Locks
Transaction Management
Transaction Management Overview
Submitted to Dr. Badie Sartawi Submitted by Nizar Handal Course
Locks.
Database Systems (資料庫系統)
Lecture 18: Concurrency Control
Database Systems (資料庫系統)
Transaction Management Overview
Prepared by: Mudra Patel (113) Pradhyuman Raol(114)
Presentation transcript:

18.3 Test Questions By Donavon M. Norwood 03/04/2009

Locks are use on database elements to: Maintain the locking table Request from transactions Prevent unauthorized access to DB Prevent unserializable behavior

2) The scheduler uses the Locking Table to: Backup the database Join two tables Issue select statements from users None of the above

3) Locks have the intended meaning: Locks DB from unauthorized access Allows access to Locking table No two transactions may have locked the same element without one having first released the lock Allows transactions to be consistent/inconsistent

4) The Locking Table is used by the scheduler to: Process data Provide a illegal schedule of transactions Commit data written by transactions Guide the decision of the scheduler to allow or block transactions

5) Which is the correct events for locking: a) r(A); u(A); w(A); l(A) b) w(A); u(A); r(A); l(A) c) l(A); r(A); w(A); u(A) d) u(A); w(A); l(A); r(A);

GOOD LUCK!