Quantum DXi4700

Chapter 9: Configuration
OST Configuration
Quantum DXi4700 User’s Guide 233
Replication Method Description
Automatic Image Replication (AIR) If you are using Veritas NetBackup 7.1 or higher, you can
configure an LSU for Automatic Image Replication (see OST
Configuration on page 231). If enabled, data on an LSU is
automatically replicated to a remote LSU that resides on a
DXi in a different NetBackup domain. The timing of the
duplication, as well as the backup images that are duplicated,
are determined by the storage lifecycle policies (SLPs)
configured in NetBackup. With AIR, you can specify a single
replication target.
Concurrent Optimized Duplication For both optimized duplication and Automatic Image
Replication, you can optionally enable Concurrent Optimized
Duplication. If enabled, as data is written to the storage
server, it is simultaneously replicated to the target DXi. When
optimized duplication or Automatic Image Replication
subsequently occurs, the operation is more efficient because
a portion of the required data has already been replicated to
the target storage server.
It is important to remember that, with Automatic Image Replication, the local and remote LSUs reside in
different NetBackup domains. This differs from optimized duplication, which occurs between two LSUs
residing within the same NetBackup domain.
Note: For more information about configuring the DXi4700 for optimized duplication or Automatic
Image Replication, see the DXi-Series NetBackup and Backup Exec OST Configuration Guide (6-
67079).
Note: For information about configuring NetBackup for optimized duplication or Automatic Image
Replication (also referred to as duplicating images to a remote master server domain), see the Veritas
NetBackup Administrator's Guide.
Task Overview: Setting Up Automatic Image Replication
Setting up Automatic Image Replication (AIR) requires that you first configure the target (remote) DXi and
then the source DXi (see Figure 150 on the next page). In addition, you must create storage lifecycle policies
(SLPs) in NetBackup that define when the automatic replication occurs and which backup images are
duplicated.
To automatically replicate (duplicate) all data on an LSU to a remote LSU that resides on a DXi in a different
NetBackup domain:
1. On the target system, add the source system to the list of allowed replication sources (see ).
2. On the target system, create a local OST user (see Manage Users on page 319).
Caution: On the target system, make sure to create a local user on the Configuration > OST >
Manage Users page.