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Oracle Database 12c Backup and Recovery Survival Guide

You're reading from   Oracle Database 12c Backup and Recovery Survival Guide A comprehensive guide for every DBA to learn recovery and backup solutions

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Product type Paperback
Published in Sep 2013
Publisher Packt
ISBN-13 9781782171201
Length 440 pages
Edition 1st Edition
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Toc

Table of Contents (22) Chapters Close

Oracle Database 12c Backup and Recovery Survival Guide
Credits
About the Author
Acknowledgement
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
1. Understanding the Basics of Backup and Recovery 2. NOLOGGING Operations FREE CHAPTER 3. What is New in 12c 4. User-managed Backup and Recovery 5. Understanding RMAN and Simple Backups 6. Configuring and Recovering with RMAN 7. RMAN Reporting and Catalog Management 8. RMAN Troubleshooting and Tuning 9. Understanding Data Pump 10. Advanced Data Pump 11. OEM12c and SQL Developer Scenarios and Examples – A Hands-on Lab Index

Configuring compression for backups


Compression comes in handy as it enables us to reduce the storage space for the backups taken. However, compression is a double-edged sword. Where using it enables us to save storage space, it may also burn the CPU from an acceptable percentage to a very high value, based on many factors. Because RMAN has inbuilt compression, there shouldn't be a requirement to seek this feature from any third party tool(s).

RMAN offers various types of compression schemes with different kinds of compression ratios using different amounts of system resources. The available options for compression are as follows:

  • None

  • Basic

  • Low

  • Medium

  • High

You can configure the default or basic compression mode using the CONFIGURE command:

RMAN> CONFIGURE COMPRESSION ALGORITH 'BASIC';

In order to use any other mode of compression, the same command can be used along with the name of the mode, as shown in the following example:

RMAN> CONFIGURE COMPRESSION ALGORITHM 'LOW';

As we have already...

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