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in RMAN by ACE (20,920 points)

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by ACE (20,920 points)

A level 1 incremental backup can be either of the following types:

    A differential backup, which backs up all blocks changed after the most recent incremental backup at level 1 or 0
    RMAN> BACKUP INCREMENTAL LEVEL 1 DATABASE;
    

    Sunday

    An incremental level 0 backup backs up all blocks that have ever been in use in this database.

    Monday - Saturday

    On each day from Monday through Saturday, a differential incremental level 1 backup backs up all blocks that have changed since the most recent incremental backup at level 1 or 0. So, the Monday backup copies blocks changed since Sunday level 0 backup, the Tuesday backup copies blocks changed since the Monday level 1 backup, and so forth.

    The cycle is repeated for the next week.


    A cumulative backup, which backs up all blocks changed after the most recent incremental backup at level 0
    BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; # blocks changed since level 0

    
    Sunday

    An incremental level 0 backup backs up all blocks that have ever been in use in this database.

    Monday - Saturday

    A cumulative incremental level 1 backup copies all blocks changed since the most recent level 0 backup. Because the most recent level 0 backup was created on Sunday, the level 1 backup on each day Monday through Saturday backs up all blocks changed since the Sunday backup.

    The cycle is repeated for the next week.

 

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