What is the right TAG for incremental level 1 backup?

Question

We have a sunday level 0 backup like this:
run {
backup as compressed backupset
filesperset 1
     incremental level 0 database
     tag='LEVEL_0_BACKUP'
     include current controlfile
     plus archivelog delete input;
SQL 'alter database backup controlfile to trace';
And Monday to Saturday incremental level 1 backup as this:
run {
backup as compressed backupset
     incremental level 1 database
     tag='LEVEL_1_BACKUP'
     include current controlfile
     plus archivelog delete input;
SQL 'alter database backup controlfile to trace';
Those scripts existed a while ago. I wonder if level 1 tag should be same as level 0 so they can all combined together?
Please kindly advice.

Answer 1

849425 wrote:
Thanks for all your response.
What I think is with block change tracking enabled, is that the incremental should roll into the level 0 full backup?
What makes you think that?  Block change tracking simply allows rman to avoid having to scan every block to see if it needs to be backed up.
I've never heard of an incremental (level 1) "rolling into" a level 0.
Recovery starts with restoring the files from a level 0.  Followed by restoring individual blocks from the Level 1.  Followed by applying changes from the archived redo.  Followed by (if necessary) applying changes from the online redo.
As stated earlier, tags are just user-defined labels.  Use them however seems appropriate -- after fully understanding what they are and what they are not. User-specified tags are not even required. I'd be cautious about changing them in an already defined and running system.