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RMAN(Recovery Manager Tool) Overview

RMAN is a command-line database client,having its own command syntax.

RMAN executable is located in $ORACLE_HOME/bin . From the RMAN client uses its own RMAN commands and SQL statements to perform and report on backup and recovery operations.

RMAN Backup and recovery operation can also be performed through Enterprise Manager.



Major benefits of using RMAN over other backup and recovery techniques:

  • RMAN is having its own simpler command syntax.
  • RMAN provides very simpler way to create duplicate database, which is very helpful in standby database creation.
  • RMAN provides encrypted backup ability, which can’t be performed by any other backup strategy.
  • RMAN provides command to take backup report.
  • Through RMAN, we can validate (check any corruption) the backup that whether it can be restored or not and can be recoverable or not.
  • RMAN provides incremental backup strategy.
  • RMAN can automatically detect corrupted data blocks during backup
  • RMAN provides command to recover corrupted data blocks instead of recovering whole backup.
  • In 11g we can duplicate a database without taking backups by active duplication strategy.
  • RMAN can automatically delete all unnecessary (obsolete and expired) backups of data files and archived log files from disk.
  • RMAN has powerful Data Recovery Advisor feature, which enables you to easily diagnose and repair data failures and corruption.
  •  RMAN has a unused block compression feature, in which during backup it skips unused data blocks.






Source: Internet