Compressed backups

 

Compressed backups reduce the amount of space required for storing backup sets. You create a compressed backup of a database by using the command:

RMAN> BACKUP AS COMPRESSED BACKUPSET DATABASE;

The compressed backup set feature cannot be used with pre–Oracle Database10gdatabases. The COMPATIBILITY database initialization parameter must be set to at least10.0.0.0. The compression applies only to backup sets, not image copies.

You can configure RMAN to automatically make compressed backup sets with the CONFIGURE DEVICE TYPE command:

RMAN> CONFIGURE DEVICE TYPE DISK PARALLELISM 2

2> BACKUP TYPE TO COMPRESSED BACKUPSET;

By default compression is disabled.

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