Oracle RMAN Point-in-Time Recovery Guide

1 year ago
Liam
2 minutes

To recover time differences using Oracle RMAN, you can follow these steps:

  1. Specific point in time to restore: The specific time point in which the database will be restored to. This could be at a previous point in time before the failure occurred.
  2. Set up RMAN: Ensure that the RMAN backup and recovery environment is properly configured. This includes correctly configuring backup targets, target databases, and target recovery directories.
  3. Prepare to perform recovery: Before executing the recovery operation, you need to check the backup status of the database and verify the integrity of the backups. Run the following command to check the backup set:
  4. Show me the list of backups.
  5. You can also validate the backup set’s effectiveness using the crosscheck command.
  6. “RMAN> Verify the status of backups.”
  7. Start recovery operation: Use the rman command line tool to initiate the recovery process. You can start RMAN and begin the recovery process by using the following command.
  8. $rman target /
    RMAN> run {
    SET UNTIL TIME to ‘yyyy-mm-dd:hh24:mi:ss’;
    RESTORE the DATABASE;
    RECOVER the DATABASE;
    }
  9. In the above command, yyyy-mm-dd:hh24:mi:ss is the time point you want to restore to. The RESTORE DATABASE command will restore the database files to the selected time point, while the RECOVER DATABASE command will apply log files to recover the database to the selected time point.
  10. Finish recovery operation: RMAN will perform the recovery operation and restore the database to the selected point in time. After the recovery operation is complete, you can verify if the database has been successfully restored.

Please note that executing a restore operation may result in losing all changes made after the selected time point. Therefore, before performing a restore operation, please make sure you understand the potential risks and undertake appropriate backup and restore actions as needed.

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