set to database for Rman Back up

This example changes the default backup destination from disk to tape and then again backup to default.

RMAN> show default device type;
using target database control file instead of recovery catalog
RMAN configuration parameters are:
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default

RMAN> CONFIGURE DEFAULT DEVICE TYPE TO 'SBT_TAPE';
old RMAN configuration parameters:
CONFIGURE DEFAULT DEVICE TYPE TO DISK;
new RMAN configuration parameters:
CONFIGURE DEFAULT DEVICE TYPE TO 'SBT_TAPE';
new RMAN configuration parameters are successfully stored

RMAN> CONFIGURE DEFAULT DEVICE TYPE CLEAR;
old RMAN configuration parameters:
CONFIGURE DEFAULT DEVICE TYPE TO 'SBT_TAPE';
RMAN configuration parameters are successfully reset to default value

RMAN> show default device type;
RMAN configuration parameters are:
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default

RMAN> show backup optimization;
RMAN configuration parameters are:
CONFIGURE BACKUP OPTIMIZATION OFF; # default

RMAN> CONFIGURE BACKUP OPTIMIZATION ON;
new RMAN configuration parameters:
CONFIGURE BACKUP OPTIMIZATION ON;
new RMAN configuration parameters are successfully stored

RMAN> show backup optimization;
RMAN configuration parameters are:
CONFIGURE BACKUP OPTIMIZATION ON;

RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON;
old RMAN configuration parameters:
CONFIGURE CONTROLFILE AUTOBACKUP OFF;
new RMAN configuration parameters:
CONFIGURE CONTROLFILE AUTOBACKUP ON;
new RMAN configuration parameters are successfully stored

By default, the format of the autobackup file for all configured devices is the substitution variable %F. This variable format translates into c-IIIIIIIIII-YYYYMMDD-QQ,

where:IIIIIIIIII stands for the DBID.

YYYYMMDD is a time stamp of the day the backup is generated

QQ is the hex sequence that starts with 00 and has a maximum of