Book Image

Oracle Data Guard 11gR2 Administration : Beginner's Guide

Book Image

Oracle Data Guard 11gR2 Administration : Beginner's Guide

Overview of this book

Data Guard is the high availability, disaster recovery and data replication solution for Oracle Databases. With the huge growth of Data Guard it's getting harder to encounter an Oracle DBA not dealing with Data Guard. Since it's a common DBA task to provide high availability of databases, Data Guard is a must-know topic for every Oracle Database Administrator."Oracle Data Guard 11g R2 Beginner's Administration Guide" is a practical guide that provides all the information you will need to configure and maintain Data Guard. This book will show you what Data Guard can really do.By following the practical examples in this book, you'll learn to set up your Data Guard Broker, the management framework for Data Guard configurations. Learn and implement different data protection modes, perform role transitions between databases (switchover and failover) and configure Active Data Guard. Next, we will dive into the features of Snapshot Standby. The book progresses into looking at Data Guard configuration with other Oracle products (such as EM, RAC, and RMAN) and patch databases in Data Guard. The final chapters will cover commonly encountered Data Guard issues and Data Guard best practices, which are very important to make a Data Guard configuration perfect and take maximum advantage of Data Guard properties.
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
Index

Time for action – making a physical standby database environment ready for conversion


You can perform the following steps to make a physical standby database environment ready for conversion:

  1. Stop the media recovery on the physical standby with the following statement:

    SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;
    
    Database altered.
  2. In order to prepare the primary database for possible switchovers with the logical standby in future, we will make some changes on the archival initialization parameters. This step is optional and if you don't plan any switchovers between the primary and logical standby in the future, you can skip this step. Run the following statements on the primary database to change the parameters:

    SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_1='LOCATION=/u01/app/oracle/archive VALID_FOR=(ONLINE_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=TURKEY_UN' SCOPE=BOTH;
    
    System altered.
    
    SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_3='LOCATION=/u01/app/oracle/archive_std VALID_FOR...