Скачать или смотреть Configuring for Recoverability in Oracle || Admin II Chapter No 02 Part 3rd

After completing this lesson, you should be able to:
Invoke and configure Recovery Manager (RMAN)
Configure your database in ARCHIVELOG mode
Configure multiple archive log file destinations to increase availability
Configure the Fast Recovery Area (FRA)
Specify a retention policy
The purpose of backup and recovery is to restore a failed database. Backups protect the database against problems such as hardware failure, media failure, user errors, and application errors. Media errors cause data problems by failing at the hardware level; a bad controller or disk drive can introduce either subtle or obvious errors. Users can also cause data errors, simply by issuing commands that should not be issued. Those same types of errors can be caused by an application with a bug.
Backups can also be used for data preservation and historical retention. Backups taken and preserved in ARCHIVELOG mode can be used to recover a database to a past point in time, which can be useful to meet compliance regulations.
You can also use backup and recovery tools to move data to other databases—even in other locations. A backup of a database is one possible way to duplicate it at another location.