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RMAN has many advantages that the logical backup with EXP/IMP cannot
provide for you. Among these advantages are:
1. Ability to perform block-level incremental backups
2. Ability to backup your archived redo logs
3. Ability to backup your control files and SPFILE
4. Ability to report on those files that need a backup
5. Ability to recover to a point in time
Using EXP/IMP is not a valid backup and recovery solution, in my
opinion. The EXP/IMP tools can augment your backup and recovery
options, but I would never run a production database with just these
tools as my backup and recovery strategy. You will not be able to
recover to a point in time. You will have to manually backup your
control files and your initialization file. If you have to restore, all
objects restored from the dump file become "new" objects to the
database, even if they have the same name.
I would strongly recommend that you implement RMAN as your backup and
recovery strategy.
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