What are different modes of Backup in Oracle RMAN ?
Backup Modes in Oracle RMAN:
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Backup Type
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Definition
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Full
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This is method in which backup of a datafile
that includes every allocated block in the file being backed up. A full
backup of a datafile can be an image copy, in which every data block is
backed up. It can also be stored in a backup set, in which case datafile
blocks not in use may be skipped.
A
full backup cannot be part of an incremental backup strategy; that is, it
cannot be the parent for a subsequent incremental backup.
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Incremental
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An incremental backup is either a level 0 backup,
which includes every block in the file except blocks compressed out because
they have never been used, or a level 1 backup, which includes only those
blocks that have been changed since the parent backup was taken.
A level 0
incremental backup is physically identical to a full backup. The only
difference is that the level 0 backup is recorded as an incremental backup in
the RMAN repository, so it can be used as the parent for a level 1 backup.
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Tags: Backup, Oracle Database, RMAN
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