Basic phases in a NetBackup backup of an AHV

The following table provides an overview of the processes that NetBackup undertakes during an AHV backup.

Phase	Description
Phase 1: Validation of a BigData policy	NetBackup validates the BigData policy that you have created to backup the AHV virtual machines.
Phase 2: Initiation of a backup job	A backup job is triggered manually or according to the schedule that you have specified during policy creation.
Phase 3: Discovery of clients and commencing to backup the data on the clients	The backup process triggers two jobs - a parent job and a child job. The parent job identifies the added clients or the virtual machines to be backed up and creates a snapshot of the virtual machine. A new process called nbappidiscv is introduced to discover clients and create snapshots. After the snapshot is created, it is mounted on the backup host at the following location: `/usr/openv/tmp/ntxmnt` The child job conducts the actual read-write operation to backup the data on a disk.
Phase 4: Completion of the backup job	On successful completion of a backup, the NetBackup client on the backup host unmounts and then deletes the snapshot.