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 – creating objects on the logical standby database


Now let's try to create some objects on the logical standby database. First we will create a test table with the HR user. The Database Guard mode is ALL, which is the default.

  1. Connect the logical standby database with SYS user and execute the following query:

    SQL> SELECT GUARD_STATUS FROM V$DATABASE;
    
    GUARD_S
    -------
    ALL
    
    SQL> CONN SCOTT/TIGER
    Connected.
    SQL> CREATE TABLE TEST (A NUMBER);
    create table test (a number)
    *
    ERROR at line 1:
    ORA-01031: insufficient privileges

    The error message specifies a privilege problem but this is not due to the lack of create table privilege for the HR user. We receive this error because the Database Guard mode does not allow for creation of the table. Let's change it and try again.

  2. Connect with the SYS user using the following query:

    SQL> ALTER DATABASE GUARD STANDBY;
    Database altered.
    
    SQL> CONN SCOTT/TIGER
    Connected.
    
    SQL> CREATE TABLE TEST (A NUMBER);
    Table created.
    
    SQL&gt...