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Oracle Database 11g : Underground Advice for Database Administrators

You're reading from  Oracle Database 11g : Underground Advice for Database Administrators

Product type Book
Published in Apr 2010
Publisher Packt
ISBN-13 9781849680004
Pages 348 pages
Edition 1st Edition
Languages
Author (1):
April Sims April Sims
Profile icon April Sims

Table of Contents (14) Chapters

Oracle Database 11g—Underground Advice for Database Administrators
Credits
About the author
About the reviewers
Preface
1. When to Step Away from the Keyboard 2. Maintaining Oracle Standards 3. Tracking the Bits and Bytes 4. Achieving Maximum Uptime 5. Data Guard and Flashback 6. Extended RMAN 7. Migrating to 11g: A Step-Ordered Approach 8. 11g Tuning Tools Index

RMAN cloning and standbys—physical, snapshot, or logical


In 11g, all databases are now identified uniquely by DBIDs. In earlier versions, every database copy made by a method other than the duplicate command had the same DBID. In previous versions of Oracle, you would use the NID utility to change the DBID and ORACLE_SID for certain cloning procedures to a test database. You couldn't do this for standby databases because changing the DBID or ORACLE_SID would invalidate the configuration and the Data Guard process would not work. This is no longer needed—RMAN can now duplicate a production database for any reason. There is just a small difference in the commands run for the different types.

It is very easy to create a copy of a production instance with RMAN using the duplicate command. Most often this is to refresh a database for testing environments. Duplicating a database for a standby is slightly different, but the basic concepts are the same. What is great about doing this process on a...

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