'Consistent state' diaporamas de présentation

CS 245: Database System Principles Notes 08: Failure Recovery

CS 245: Database System Principles Notes 08: Failure Recovery. Hector Garcia-Molina. PART II. Crash recovery (2 lectures) Ch.17[17] Concurrency control (3 lectures) Ch.18[18] Transaction processing (2 lects) Ch.19[19] Information integration (1 lect) Ch.20[21,22].

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Transaction Manager

Transaction Manager. Concurrency Control Recovery Management. Transactions A transaction program is a unit of program execution that accesses and possibly updates various data items. [ A transaction program is a collection of operations that form a single unit of work.]

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CS5214 Spring 2001 Elango Sundaram Jeffery W. Wilson

Agent-Based Forwarding Strategies for Reducing Location Management Cost in Mobile Networks Ing-Ray Chen, Tsong-Min Chen, and Chiang Lee. CS5214 Spring 2001 Elango Sundaram Jeffery W. Wilson. Problem statement.

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CS216 Advanced Database Systems

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Planning in Dynamic and Partially-unknown environments

Planning in Dynamic and Partially-unknown environments. Maxim Likhachev University of Pennsylvania. Dynamic and Partially-known Environments. Planning in partially-known environments is a repeated process dynamic environments is also a repeated process. ATRV navigating

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Transactional Memory Guest Lecture Design of Parallel and High-Performance Computing

Transactional Memory Guest Lecture Design of Parallel and High-Performance Computing. Georg Ofenbeck. TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A. Locking Recap: The Problem. void PushLeft ( DQueue *q, int val ) {

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Relaxation and Hybrid constraint processing

Relaxation and Hybrid constraint processing. Different relaxation techniques Some popular hybrid techniques. Relaxation. Node consistency Forward check Lookahead check AC1 AC3 Path-consistency. Running example. The 4-houses puzzle:.

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Inversion of Control for dummies! Jon Tirs en Aslak Hellesoy

Inversion of Control for dummies! Jon Tirs en Aslak Hellesoy. Inversion of Control (IoC) is about software components doing what they are told, when they are told. Your OO application could well become unmaintainable without it. - Paul Hammant, ThoughtWorks. IoC is not the silver bullet.

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Access control models and policies

Access control models and policies. Aalto University , autumn 2011. Outline. Access control Discretionary AC Mandatory AC Other AC models. Access control. Access control (AC). Subjects request actions on objects Alice wants to read a file Bob wants to update account balance

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Transactions and Web Services

Transactions and Web Services. Web Environment. Web Service activities form a unit of work, but ACID properties are not always appropriate since Web is loosely coupled and activities are frequently long-running Communication delays Server loading (and hence response time) is unpredictable

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Constraints and Updating

Constraints and Updating. Hugh Darwen hugh@dcs.warwick.ac.uk www.dcs.warwick.ac.uk/~hugh. CS252.HACD: Fundamentals of Relational Databases Section 7: Constraints and Updating. Constraints. Constraints express the integrity rules for a database.

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Consistency in Distributed Systems

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Database Integrity and Security

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Transactions

Transactions. What is a Transaction?. A transaction represents a real-world event such as the sale of a product.

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CS4432: Database Systems II

CS4432: Database Systems II. Lecture #19 Database Consistency and Transactions. Professor Elke A. Rundensteiner. Transactions, etc. Crash recovery Ch. [17] Concurrency control Ch. [18] Transaction processing Ch. [19]. Name. Age. White Green Gray. 52 3421 1.

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File Management in Representative Operating Systems

File Management in Representative Operating Systems. UNIX File Management. File Stream of bytes Internal logical structure is application specific Types of files Ordinary Contains information entered by user, application program, or system utility program Directory

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Basic Data Manipulation - Changing Data

Basic Data Manipulation - Changing Data . Objectives To learn how to add/change/remove data Contents the INSERT Statement Practical 4-1 the UPDATE Statement the DELETE Statement Practical 4-2 Transaction control. The INSERT Statement. INSERT INTO table [(column list)]

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Answer 1

Answer 1. no central points of attack. DHT algorithms are deterministic so if the file is on the network and the DHT is in a consistent state, it will be located .

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