Oracle 11gR2 Compression feature.

In Oracle 10g we had basic compression in RMAN.
But Oracle 11gR2 has added some more compression features.

There are basically four compression levels.

HIGH   = unmodified BZIP2
MEDIUM = ZLIB
LOW    = LZO
BASIC  = BZIP2

If you don't have advance compression but want to use
basic compression you can issue the following command:

RMAN> configure compression algorithm 'basic';

If you have advanced compression feature then you can issue
any of the following commands:

RMAN> configure compression algorithm 'high';

or

RMAN> configure compression algorithm 'medium';

or

RMAN> configure compression algorithm 'low';


If you want to reset to defaults
then you can issue the following command:

RMAN> configure compression algorithm clear;