Database Reference
In-Depth Information
RMAN offers compression of backup images through various means.
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RMAN offers encryption of database backups.
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RMAN provides various backup reporting capabilities.
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RMAN provides scripting capabilities when you are using a recovery catalog.
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With the Media Management Library (MML) you can integrate easily with third-party
tape media software.
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RMAN provides for parallel processing of backups and restores.
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With RMAN, you can create duplicate databases.
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RMAN helps you migrate data files across operating-system platforms.
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With RMAN, you can perform tablespace point-in-time recovery (TSPITR).
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RMAN allows you to recover data files that aren't backed up.
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RMAN will automatically recover tempfiles during a database recovery.
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Exploring the RMAN Architecture
One of the nice things about RMAN is that it's part of Oracle. Thus, it can natively use the
existing Oracle architecture. Quite a few of the limitations with manual backups are addressed
in RMAN. With each release, RMAN has new features that make it even more powerful.
RMAN has a rich feature set, and with each version of Oracle, the feature set becomes
even richer. Oracle Database 12
c
offers a very full-featured backup and recovery tool in
the form of RMAN.
RMAN is based on a robust architecture consisting of the following main components:
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The RMAN client interface
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The database server
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The database control file
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The optional recovery catalog
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Database pfiles or spfiles
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Backup media and the Media Management Library
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Backup sets and backup set pieces
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RMAN channels
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The snapshot control file
Let's look at each component in a bit more detail:
RMAN Client Interface
The
RMAN command-line interface (RCLI)
provides access to
Recovery Manager. This process spawns off-server sessions that connect to the
target data-
base
, which is the database that will be backed up. From the RMAN client interface you
will issue RMAN commands to execute RMAN backup, recovery, and restore operations.
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