November 2001
Intermediate to advanced
126 pages
3h
English
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Restoring Read-Only Tablespaces
Once you back up a read-only tablespace, you don’t need to back it up again. However, you may want to periodically back up your read-only tablespaces so that in the event of a recovery, RMAN doesn’t have to retrieve a backup set that may be on tape and offsite. RMAN does not require any archived redo log files to restore and recover a read-only tablespace. Also, to recover a read-only tablespace you do not need to bring down the database. The steps are:
Take the tablespace offline.
Restore the tablespace or the appropriate datafiles.
Bring the tablespace online. No recovery is necessary.
For example:
RMAN>sql 'alter tablespace old_rnd offline';RMAN>restore tablespace old_rnd;RMAN>sql 'alter tablespace old_rnd online';
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