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

Upgrading OPatch


If you have installed Oracle 11gR2, the OPatch version will be 11.1.0.6.6 by default. If you proceed to apply any latest patches of 11.2.0.1, you must upgrade the OPatch version as well. The following error will be displayed if you try to apply a higher update of the patch and if your OPatch version is lower:

OPatch version    : 11.1.0.6.6
.......
ApplySession failed: Patch ID is null.
System intact, OPatch will not attempt to restore the system
OPatch failed with error code 73

From the logfile /u01/home/oracle/product/11.2.0/db_1/cfgtoollogs/opatch/opatch2012-12-15_11-57-48AM.log, the following message will be shown:

INFO:Starting ApplySession at Sat Dec 15 11:57:49 IST 2012
INFO:Starting Apply Session at Sat Dec 15 11:57:49 IST 2012
SEVERE:OUI-67073:ApplySession failed: Patch ID is null.
INFO:System intact, OPatch will not attempt to restore the system
INFO:Finishing ApplySession at Sat Dec 15 11:57:51 IST 2012

To fix this issue, first upgrade the OPatch utility by downloading...