RMAN: How to modify RMAN CHANNEL ?

rman target /

RMAN> show all;

using target database control file instead of recovery catalog

RMAN configuration parameters for database with db_unique_name QEMPR_NJ2 are:

CONFIGURE RETENTION POLICY TO REDUNDANCY 2;

CONFIGURE BACKUP OPTIMIZATION ON;

CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default

CONFIGURE CONTROLFILE AUTOBACKUP ON;

CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/location/rman/dbname/%F';

CONFIGURE DEVICE TYPE DISK PARALLELISM 4 BACKUP TYPE TO BACKUPSET;

CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default

CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default

CONFIGURE CHANNEL 1 DEVICE TYPE DISK CONNECT '*' FORMAT   '/location/rman/dbname/full_dbname_%T_%U';

CONFIGURE CHANNEL 2 DEVICE TYPE DISK CONNECT '*' FORMAT   '/location/rman/dbname/full_dbname_%T_%U';

CONFIGURE MAXSETSIZE TO UNLIMITED; # default

CONFIGURE ENCRYPTION FOR DATABASE OFF; # default

CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default

CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default

CONFIGURE ARCHIVELOG DELETION POLICY TO BACKED UP 1 TIMES TO DISK;

CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/location/rman/dbname/snapcf_dbname.f';

RMAN> SHOW CHANNEL;

RMAN configuration parameters for database with db_unique_name dbname are:

CONFIGURE CHANNEL 1 DEVICE TYPE DISK CONNECT '*' FORMAT   '/location/rman/dbname/full_dbname_%T_%U';

CONFIGURE CHANNEL 2 DEVICE TYPE DISK CONNECT '*' FORMAT   '/location/rman/dbname/full_dbname_%T_%U';

RMAN> CONFIGURE CHANNEL 1 DEVICE TYPE DISK CLEAR;

old RMAN configuration parameters:

CONFIGURE CHANNEL 1 DEVICE TYPE DISK CONNECT '*' FORMAT   '/location/rman/dbname/full_dbname_%T_%U';

old RMAN configuration parameters are successfully deleted

RMAN> CONFIGURE CHANNEL 2 DEVICE TYPE DISK CLEAR;

old RMAN configuration parameters:

CONFIGURE CHANNEL 2 DEVICE TYPE DISK CONNECT '*' FORMAT   '/location/rman/dbname/full_dbname_%T_%U';

old RMAN configuration parameters are successfully deleted

RMAN> SHOW CHANNEL;

RMAN configuration parameters for database with db_unique_name dbname are:

RMAN configuration has no stored or default parameters