Book Image

OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide

Book Image

OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide

Overview of this book

Oracle Database Server is the most widely used relational database in the world today. This book gives you the essential skills to master the fundamentals of Oracle database administration and prepares you for Oracle DBA certification."OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide" prepares you to master the fundamentals of Oracle database administration using an example driven method that is easy to understand. The real world examples will prepare you to face the daily challenges of being a database administrator.Starting with the essentials of why databases are important in today's information technology world and how they work, you are then guided through a full, customized installation of the Oracle software and creating your own personal database. We then examine fundamental concepts of Oracle, including architecture, storage structures, security, performance tuning, networking, and instance management. Finally, we take an in-depth look at some of the most important concepts in the daily life of an Oracle DBA - backup, recovery, and data migration."OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide" provides you with the skills you need in order to become a successful Oracle DBA, both for certification and real life tasks.
Table of Contents (24 chapters)
OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide
Credits
Foreword
About the Author
About the Reviewer
www.packtpub.com
Preface
Index

Performing RMAN offline backups


Now that we've introduced some of the terminology, we can look at the process of performing an actual backup. In this section, we'll look at RMAN offline backups—backups that are run when the database is shut down. These are also sometime referred to as closed backups. Although hot backups are more common when using RMAN, we'll find that the process is nearly identical, other than the state of the database. However, we should always remember the downside to offline backups. Although offline backups allow for complete recovery of a database, this is only the case if the database is in ARCHIVELOG mode. Generally, the only reason for a DBA to run offline backups is if the database is required to be in NOARCHIVELOG mode. This configuration does not allow for complete recovery up to the point of failure, as there are no archive logs to reconstruct the changes in the database since the backup occurred.

Performing a tablespace-level RMAN backup

Although it is less...