How the NetBackup for SAP Snapshot Client works
A backup is initiated when:
An automatic schedule executes the backup script that is specified in the Backup Selection of the policy. The backup script contains brtools commands to start a backup.
A user or external process on the client host invokes the brtools commands to start a backup.
The brtools include the brbackup command. The brbackup command initiates backup of the specified objects. The brbackup command provides a list of physical file names to NetBackup for SAP.
The argument to the brbackup command -d parameter determines if the backup uses the backint or RMAN backup interfaces. Then either brbackup or RMAN provides the file list to NetBackup for SAP. NetBackup for SAP verifies that the policy it selected for the backup is configured with the appropriate Snapshot Client attributes, and then initiates file-based backups of the Oracle files, and performs the data movement.
Before NetBackup for SAP performs the backups, it requests that brbackup or RMAN put the data files being backed up into backup mode.
NetBackup then creates a snapshot of the files. When the snapshot is complete, NetBackup for SAP signals back to brbackup or RMAN to take the data files out of backup mode. The data files that are selected for backup are in backup mode for the time necessary to capture a snapshot of the data.