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Oracle Data Guard 11gR2 Administration : Beginner's Guide

You're reading from Oracle Data Guard 11gR2 Administration : Beginner's Guide

Product type Book

Published in Jun 2013

Publisher Packt

ISBN-13 9781849687904

Pages 404 pages

Edition 1st Edition

Languages

Concepts

Database Administration

Table of Contents (19) Chapters

Oracle Data Guard 11gR2 Administration Beginner's Guide

Credits

About the Authors

About the Reviewers

www.PacktPub.com

Preface

Pop Quiz Answers

Getting Started

Configuring the Oracle Data Guard Physical Standby Database

Configuring Oracle Data Guard Logical Standby Database

Oracle Data Guard Broker

Data Guard Protection Modes

Data Guard Role Transitions

Active Data Guard, Snapshot Standby, and Advanced Techniques

Integrating Data Guard with the Complete Oracle Environment

Data Guard Configuration Patching

Common Data Guard Issues

Data Guard Best Practices

Index

Configuring a connection failover

Building a configuration in which database clients are able to automatically connect to a new primary database after a role change is vital in Data Guard. If we skip this important aspect, it may be very hard to configure connections of all database users to the new primary database.

Now, let's learn about the important connection failover terms – Transparent Application Failover (TAF), Fast Connection Failover (FCF), and Fast Application Notification (FAN).

Transparent Application Failover (TAF)

TAF is a connection failover configuration of Oracle Call Interface (OCI) that is used for high-availability environments such as Oracle Data Guard, Oracle Real Application Clusters (RAC), and Oracle Fail Safe.

When using this configuration, clients can automatically establish a prespecified connection to the database after a failure of the database instance. In RAC, this means connecting to one of the surviving instances and in Data Guard it means connecting to the...

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