Book Image

Oracle 11g R1 / R2 Real Application Clusters Handbook

Book Image

Oracle 11g R1 / R2 Real Application Clusters Handbook

Overview of this book

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. RAC is an integral part of the Oracle database setup: one database, 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 practical handbook documents how to administer a complex Oracle 11g RAC environment. It covers all areas of the Oracle 11g R1 RAC environment, with bonus R2 information included, and is indispensable if you are an Oracle DBA charged with configuring and implementing Oracle11g. It presents a complete method for the design, installation, and configuration of Oracle 11g RAC, ultimately enabling rapid administration of Oracle 11g RAC environments.Packed with real-world examples, expert tips, and troubleshooting advice, the book begins by introducing the concept of RAC and High Availability. It then dives deep into the world of RAC design, installation, and configuration, enabling you to support complex RAC environments for real-world deployments. Chapters cover 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 the 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 in real-world situations.
Table of Contents (20 chapters)
Oracle 11g R1/R2 Real Application Clusters Handbook
Credits
About the Authors
About the Reviewers
Preface

Oracle 11g Data Guard and RAC


Data Guard is Oracle's true Disaster Recovery (DR) solution and answer to customers who require uptime and zero data loss for their mission-critical data center environments.

The following diagram shows a basic configuration with Data Guard:

Oracle Data Guard has been around for a long time--since version 8 of the Oracle database server when it was first called Oracle Physical Standby database. It evolved into Data Guard in Oracle 9i release. Since 9i and 10g, many new enhancements have been incorporated into the Data Guard solution to optimize performance and availability as well as to ease maintenance of the Data Guard operations. In a nutshell, Data Guard implements a physical or logical copy of the primary database at a remote standby site that can be used to failover or switchover to the standby database server on the remote site in the event of a disaster or planned maintenance operation. Data Guard ships redo logs from the primary database to the standby...