How are Level 0 and Level 1 backups linked?

Version:11g
I was going through the scripts in the post Two Questions on RETENTION POLICY
When you have a Differential Incremental backup strategy and When you run level 0 and level 1 backup scripts through different cronjobs from Sunday to saturday, during recovery, How will RMAN identify all these level 1 backups and its parent level 0 backup as one unit ? In the level 0 and its subsequent level 1 backup scripts, i don't see a clause which links level 0 backup and its subsequent level 1 backups?

Hi Steve_74,
How will RMAN identify all these level 1 backups and its parent level 0 backup as one unit ?The information used during a restore is comming from the controlfile.
Example
select BACKUP_TYPE, INCREMENTAL_LEVEL
from v$backup_set
Will determine the level 0 backup set needed according to your restore clause
select INCREMENTAL_LEVEL, INCREMENTAL_CHANGE#, CHECKPOINT_CHANGE#
from V$BACKUP_DATAFILE
where file# = 1
Will determine which incremental(s) to apply on datafile 1 according to your restore clause.
Regards,
Tycho
Edited by: tychos on Nov 1, 2009 1:51 AM

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