What is the need of Level 0 and Level 1 backup?
I am bit confused upon the need of Level 0 and Level 1 backup. Oracle suggested strategy in 10g creates only level 1 backup continously not breaking it and not creating any level 0 after the very first level 0 backup. But I had seen in Oracle Database Backup & Recovery Basic document it suggest to create level 0 backup on weekly or monthly basis. y?
Secondly according to my understanding when creating level 1 backup oracle first creates level 0 backup which also include datafiles image copies and then it applies incremental backup to image copies, once incremental backup is applied on image copy you does not need previous incremental backups. Am I right?
If I am right then whats the difference between level 0 & level 1 backup? as after level 0 backup you also dont need any previous backups.
Pl. help me to clarify my queries regarding this.
Regards,
Sharjeel