Rman configuration

I'm really just curious. when you define default parameters from within RMAN like we have below, does RMAN remember it? Where does it store that info so that it remains persistent?

We're thinking to use our control file rather than a recovery catalog. We also want to know if we can code default parameters for Change Tracking File, Filesperset and/or Filesperpiece.

We're setting up some new backup procedures and want to know if our setup is good. We have a 80GB database & about 20 datafiles.

### Default, but coded for safety ###

CONFIGURE DEFAULT DEVICE TYPE TO DISK;
### Keep backups for 14 days ###

CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS;
### Backup control file at end of backup routine ###
CONFIGURE CONTROLFILE AUTOBACKUP ON;
### Naming convention for control file ###
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/../ cf_%F;

### Compress backupset and number of channels to allocate ###
CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COMPRESSED BACKUPSET PARALLELISM 10;
### Configures filename formatting ###

CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/u01/NI00/backup/ora_df%d_ %s_%p';

### No limit to size of backup set ###

CONFIGURE MAXSETSIZE TO UNLIMITED; Received on Thu Aug 28 2008 - 12:08:08 CDT