From the course: Oracle Database 12c: Backup and Recovery

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Managing obsolete RMAN backups

Managing obsolete RMAN backups - Oracle Database Tutorial

From the course: Oracle Database 12c: Backup and Recovery

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Managing obsolete RMAN backups

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- [Instructor] RMAN provides building capabilities for automatic backup management, meaning that there is no need for us to manually hunt down and delete all backups, but instead RMAN can take care of all of that for us all by itself. In order to accomplish that, RMAN introduces two core concepts in backup management known as obsolete backups and expired backups. RMAN considers backups of data files and control files as obsolete, meaning that they are no longer needed for recovery, based on their retention criteria we configured for RMAN. For example, if we set our RMAN retention policy to a redundancy of one, which means that RMAN is instructed to only keep a single backup copy of each one of our databases, then after the second backup of a database, the first backup will be considered obsolete by RMAN because we now have two backups but we specified that RMAN should only keep one. Let's see this example in action. We'll start by opening an RMAN connection to our target database. So…

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