Book Image

Oracle Database 11g : Underground Advice for Database Administrators

By : April Sims
Book Image

Oracle Database 11g : Underground Advice for Database Administrators

By: April Sims

Overview of this book

Today DBAs are expected to deploy and manage large databases with quality service and little to no downtime. The DBA's main focus is on increasing productivity and eliminating idle redundancy throughout the enterprise. However, there is no magic set of best practices or hard and fast rules that DBAs need to follow, and this can make life difficult. But if DBAs follow some basic approaches and best practices, tasks can be performed more efficiently and effectively.This survival guide offers previously unwritten underground advice for DBAs. The author provides extensive information to illuminate where you fit in, and runs through many of the tasks that you need to be watchful of, extensively covering solutions to the most common problems encountered by newcomers to the world of Oracle databases.The book will quickly introduce you to your job responsibilities, as well as the skills, and abilities needed to be successful as a DBA. It will show you how to overcome common problems and proactively prevent disasters by implementing distributed grid computing—scalable and robust—with the ability to redeploy or rearchitect when business needs change. Reduce downtime across your enterprise by standardizing hardware, software, tools, utilities, commands, and architectural components.This book will also help you in situations where you need to install Oracle Database 11g or migrate to new hardware making it compliant with a Maximum Availability Architecture. By the end of this book you will have learned a lot and gained confidence in your abilities. You will be armed with knowledge as to which tools are best used to accomplish tasks while proactively moving towards an automated environment.
Table of Contents (14 chapters)
Oracle Database 11g—Underground Advice for Database Administrators
Credits
About the author
About the reviewers
Preface
Index

RMAN


Did you think the previous chapter was finished? Nope, I just ran out of room in that chapter, so here we go again. RMAN can be used as part of a manual migration strategy, either by restoring a copy of an older database to a new server or using the transportable tablespace method of upgrading. At the end of this section, some tips on using RMAN catalog repository with multiple Oracle Database versions are also included.

Using RMAN as part of a manual upgrade process

RMAN is configured so that a higher release is able to restore a lower release (upgrade) or vice versa (downgrade). Think of the following exercise in two parts—using RMAN to restore and recover a database, and then upgrading the database manually to 11g. This method will work for a database either in a noarchivelog mode with a consistent RMAN backup, or an archivelog mode with an inconsistent RMAN backup. You will also need additional archivelogs for the recover until time command. Because both topics (using RMAN for the...