Proxy copy
A proxy copy is a special type of backup in which the NetBackup for Oracle agent manages the control of the data transfer. During the backup and restore operations, proxy copy enables the agent to manage the entire data movement between the disks that contain the data files and the storage devices that NetBackup manages.
With proxy copy, RMAN provides a list of files that require backup or restore to the NetBackup for Oracle agent. The agent determines how the data is moved and when to move the data. Proxy copy is an extension to Oracle's Media Management API.
Backups and restores remain tightly integrated with RMAN and its catalog, which greatly simplifies administration tasks.