Understanding Recovery Manager
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by Debjani Mallick
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·         Automatic detection of block corruption and its repairing-Block Media Recovery allows fixing of a corrupted block, detected on backup, by RMAN while the datafile is online and the non-affected files continue to be available for selecting, updating, etc. which results in increased data availability and reduction in mean time to recover.

·         Comprehensive reporting- Users can easily retrieve information about all the currently executing and completed backup jobs, details on all backed up files and backup sets which are not being used anymore using special V$ views.

·         Intelligent monitoring of disk consumption- In Oracle database 10g Release 1, Flash Recovery Area allows administrators to setup notifications on disk space usage and automate obsolescence of expired backup sets, via RMAN client command-line or enterprise manager interfaces.

·         Optimization of performance and space-saving operations- RMAN provides high backup and restores data streaming performance with the help of its intimate knowledge of Oracle block structures. RMAN backs up only blocks that are in use or have ever been used, by default, when creating backup sets and saves disk space by merging blocks into as few backup pieces as necessary.

·         Fine-granular data operations- RMAN provides fine-granular, on and offline backups at the database, tablespace, datafile, control file, archive log, and block level.

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