The NetBackup master or media server controls the flow of data from the primary storage system (client) to the secondary storage system. Client data on the primary storage system is backed up inside a secondary qtree on the NearStore system.
Backups initiated by NetBackup are based on policies. Policies determine what data is backed up, when and how often the data is backed up, how long the backed up data is retained, and where the backed up data is stored. For more information about backup policies, see the NetBackup documentation.