Oracle RMAN Basics

Oracle Recovery Manager (RMAN) is an administrative tool created by Oracle Corporation to manage Oracle backup and recovery procedures. It is an efficient, comprehensive, and secure tool to back up, restore, and recover Oracle databases. Among its many functions, RMAN can make full backups of entire databases or individual tablespaces, make incremental backups of the entire database or individual tablespaces, and perform restoration and recovery of the entire database or classes of objects. It can also do point-in-time recovery and cloning of databases. Furthermore, RMAN can be used to maintain and audit the physical and logical structure of a database as well as troubleshoot errors. The Oracle database must be in ARCHIVELOG mode in order to use RMAN.

Oracle RMAN Commands for Beginners 1. BACKUP This command is used to back up the Oracle database. It can be used to create full, incremental, and archived logs backups. 2. RESTORE This command is used to restore Oracle database backups. It can be used to restore datafiles, controlfiles, and archived logs. 3. RECOVER This command is used to recover the database from errors and other problems. It can be used to do an incomplete recovery or an online recovery. 4. DUPLICATE This command is used to duplicate a database from a backup or image copy. It can be used to duplicate a database from a remote system. 5. CHANGE This command is used to make changes in the database. It can be used to make changes to the database configuration, to add or remove a datafile, and to modify existing users or roles. 6. LIST This command is used to list information about the backup information. It can be used to list backups, images, logs, and recovery records. 7. REPORT This command is used to report on the state of the Oracle database. It can be used to report on current backups and recover points, as well as to check for corruption. 8. CROSSCHECK This command is used to check that all of the backups are available and valid. It can be used to check for missing files, duplicates, and corrupt backups. 9. CATALOG This command is used to catalog backup pieces, images, and archived logs. It can also be used to catalog any remote backups. 10. VALIDATE This command is used to validate that the backup is okay. It can be used to check for blocks, gaps, and corrupted files in the backup.