Book Image

Oracle 11g R1/R2 Real Application Clusters Essentials

Book Image

Oracle 11g R1/R2 Real Application Clusters Essentials

Overview of this book

Oracle RAC or Real Application Clusters is a grid computing solution that allows multiple nodes (servers) in a clustered system to mount and open a single database that resides on shared disk storage. Should a single system (node) fail, the database service will still be available on the remaining nodes. Oracle RAC is an integral part of the Oracle database setup. You have one database with multiple users accessing it, in real time. This book will enable DBAs to get their finger on the pulse of the Oracle 11g RAC environment quickly and easily.This book will cover all areas of the Oracle RAC environment and is indispensable if you are an Oracle DBA who is charged with configuring and implementing Oracle11g R1, with bonus R2 information included. This book presents a complete method for the configuration, installation, and design of Oracle 11g RAC, ultimately enabling rapid administration of Oracle 11g RAC environments.This practical handbook documents how to administer a complex Oracle 11g RAC environment. Packed with real world examples, expert tips and troubleshooting advice, the book begins by introducing the concept of Oracle RAC and High Availability. It then dives deep into the world of RAC configuration, installation and design, enabling you to support complex RAC environments for real world deployments. Chapters cover Oracle RAC and High Availability, Oracle 11g RAC Architecture, Oracle 11g RAC Installation, Automatic Storage Management, Troubleshooting, Workload Management and much more. By following the practical examples in this book, you will learn every concept of the RAC environment and how to successfully support complex Oracle 11g R1 and R2 RAC environments for various deployments within real world situations. This book is the updated release of our previous Oracle 11g R1/R2 Real Application Clusters Handbook. If you already own a copy of that Handbook, there is no need to upgrade to this book.
Table of Contents (20 chapters)
Oracle 11g R1/R2 Real Application Clusters Essentials
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Tuning differences: single instance versus RAC


Many DBAs are confused about how to approach performance tuning for Oracle RAC environments in contrast to single instance databases. By understanding the system architecture differences, as well as how Cache Fusion affects an RAC environment, you will be prepared to tune Oracle RAC. Cache Fusion brings new challenges and performance optimizations unique to RAC as opposed to single instance Oracle database environments, which we will examine later in this chapter.

Oracle 11g single instance database

Single instance database environments for Oracle are simpler to tune than RAC environments for the simple reason that you do not have to worry about tuning issues with respect to interconnect cluster communication. We believe that an holistic view is paramount when tuning RAC environments for Oracle. After you have tuned SQL, as well as sized the database correctly, you should address the unique characteristics for an RAC environment.

Oracle RAC 11g...