About the types of NetBackup for SAP BLI backups
NetBackup performs BLI backups with Automatic Full Backup, Automatic Differential Incremental Backup, and Automatic Cumulative Incremental Backup schedules.
NetBackup for SAP supports BLI backups only through backint. If you attempt to perform a BLI backup through RMAN proxy, the agent issues the following message:
BLIB with RMAN proxy is not a valid use case. Perform BLIB through backint.
NetBackup for SAP checks that a full backup was performed before it proceeds with an incremental backup. If the NetBackup scheduler or user initiates an incremental backup, and NetBackup for SAP finds no record of a full backup using the same policy, it performs a full backup.
To ensure that it has a proper set of images to restore, NetBackup performs a full backup when it encounters the following situations:
If NetBackup does not have a valid full backup image for the same policy in its database. For example, this situation can occur if images were expired.
If a new file was added to or deleted from the list of files for an incremental backup.
If the number of backup streams that is specified has changed from the previous backup.
NetBackup for SAP always initiates a full backup under these conditions, even if you want to perform an incremental backup.