TAILIEUCHUNG - Oracle RMAN 11g Backup and Recovery- P11

Oracle RMAN 11g Backup and Recovery- P11: Oracle, yet another edition of our RMAN backup and recovery book has hit the shelves! Oracle Database 11g has proven to be quite the release to be sure. RMAN has new functionality and whizbang new features that improve an already awesome product. RMAN has certainly evolved over the years, as anyone who started working with it in Oracle version 8 can attest to. | 468 Part IV RMAN in the Oracle Ecosystem Different Types of RMAN Duplication Oracle 11g offers multiple ways to perform database cloning using RMAN. In the past you always needed a few critical things to perform duplication access to the target database the one you want to copy and access to existing backups. In different situations both of these dependencies have been stripped allowing for more flexibility in how you plan and execute a clone operation with RMAN. Duplicate Using RMAN Backups and with Access to the Target Database This is the traditional RMAN duplication from versions 9i and 10g we leverage our existing RMAN backups to create a copy of an existing target database to a new location. To understand how far and what to duplicate RMAN connects to the existing database s control file throughout the duplication operation. Duplicate Using RMAN Backups and No Access to the Target New to 11g now you have the option of performing a duplication when the target is not available. This is useful in situations where the target database is in a different incarnation is in an inaccessible network location or is simply not at your disposal for the duplication. In this case RMAN can pull what it needs from the recovery catalog a few additional parameters you will pass to the duplicate command. We cover this near the end of the chapter in the section Target-Less Duplication in 11g. Duplicate an Active Database Without Using Backups Duplicating an active database sounds new but this operation was actually introduced in Enterprise Manager in the 10g timeframe. At that time Enterprise Manager would clone a database by calling the package dbms_backup_restore directly instead of using the RMAN client command syntax and it would make a live copy of each datafile in the database in real time and then would move that datafile to the new location. Now in 11g this is codified in the RMAN command syntax but it s the same operation. Instead of relying on an existing RMAN backup .

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