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

Most Common Data Guard broker issues


Now we will discuss some general Data Guard broker issues.

ORA-16797: database is not using a server parameter file

If you ever start an instance with PFILE instead of SPFILE, DMON will not be able to communicate with the databases. SPFILE is mandatory for communicating with remote destinations to fetch required information from the broker configuration file and server parameter files. This issue can eventually be identified from DGMGRL by retrieving configuration information as follows:

DGMGRL> show configuration;
Configuration - PACKT
  Protection Mode: MaxPerformance
  Databases:
    TURKEY_UN - Primary database
    INDIA_UN  - Physical standby database
      Error: ORA-16797: database is not using a server parameter file
Fast-Start Failover: DISABLED
Configuration Status:
ERROR

Create a new SPFILE on the standby system from PFILE, and bounce the standby database as follows:

SQL> create spfile from pfile;
File created.
SQL> shutdown immediate...