How do I Uncatalog in RMAN?

The UNCATALOG command is used to remove the backup pieces from the catalog.

  1. Example 1: To catalog a backup piece. RMAN> catalog backuppiece. 2> ‘/dba/backup/rman/data01.bkp’;
  2. Example 2: To catalog a user-managed data file copy. RMAN> catalog backup.
  3. Example 3: To uncatalog a backup piece. RMAN> change backupiece.

What is RMAN repository?

Oracle Recovery Manager (RMAN) maintains a record of database files and backups for each database on which it performs operations. This metadata is called the RMAN repository.

What is Oracle RMAN crosscheck?

Crosschecks update outdated RMAN repository information about backups whose repository records do not match their physical status. For example, if a user removes archived logs from disk with an operating system command, the repository still indicates that the logs are on disk, when in fact they are not.

How do I delete obsolete RMAN backups?

To delete obsolete backups:

  1. Connect RMAN to the target database as described in “Connecting to the Target Database Using RMAN.”
  2. Delete all obsolete backups, including backup sets and image copies, using the following command: DELETE OBSOLETE;

How do I connect to RMAN target?

9.3. 3 Connecting to the Target Database Using RMAN

  1. Open a command window.
  2. Ensure that the ORACLE_SID environment variable is set to the system identifier (SID) of the database. $ ORACLE_SID=prod; export ORACLE_SID.
  3. Do one of the following:

How do I link my RMAN catalog to target?

To use RMAN in pipe mode (scenario 1):

  1. Start RMAN by connecting to a target database (required) and specifying the PIPE option.
  2. Connect to the target database and put the desired commands on the input pipe by using DBMS_PIPE.
  3. Read the RMAN output from the output pipe by using DBMS_PIPE.

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