Incremental Backup

RMAN Incremental Backup

Level 0 (same as full backup but used for incremental backup level1)
backup incremental level 0 as compressed backupset database FORMAT 'D:\archive1011\%U';

• A differential backup, which backs up all blocks changed after the most recent incremental backup at level 1 or 0

• A cumulative backup, which backs up all blocks changed after the most recent incremental backup at level 0

backup incremental level 1 as compressed backupset database FORMAT 'D:\archive1011\%U';
backup incremental level 1 as compressed backupset database FORMAT 'D:\archive1011\%U';
backup incremental level 1 as compressed backupset database FORMAT 'D:\archive1011\%U';
backup incremental level 1 as compressed backupset database FORMAT 'D:\archive1011\%U';

Cumulative incremental backups reduce the work needed for a restore by ensuring that you only need one incremental backup from any particular level. Cumulative backups require more space and time than differential backups, however, because they duplicate the work done by previous backups at the same level.

cumulative incremental backup (backup after level 0)
backup cumulative incremental level 1 as compressed backupset database FORMAT 'D:\archive1011\%U';