HP XP P9000 Replication Manager Software 7.6.0-00 Application Agent CLI User Guide

Figure 15 Example of a cluster configuration of the mutual standby type (Active-Active)
To execute Application Agent commands in a cluster configuration of the mutual standby type
(Active-Active), create a dictionary map files for each virtual server. Additionally, you need to assign
a storage destination for the dictionary map files used by each virtual server. For details about the
dictionary map files in a cluster configuration, see “Creation in an Active-Active cluster
configuration” on page 133.
Configurations when VSS is used
Application Agent can use VSS to back up data when the backup is of a file system or an Exchange
database.
Normally, when database data stored on a storage system volume is copied to another volume, access
from hosts (database applications) must be suspended and the database must be frozen. If VSS is
used, however, the OS functionality can control transactions for database applications and I/O
operations for a volume, and the database can be frozen without the previously mentioned suspensions.
This provides higher reliability for backup operations.
Application Agent requires two servers (one file server or database server and one backup server)
when it uses VSS to back up data. The file server and database server manage primary volumes. The
backup server imports VSS snapshots and verifies the Exchange database. The backup server can
also store backup results on a tape.
In this configuration, the user executes the backup and restore commands on the file server or on the
database server. On the backup server, the Protection Manager service imports VSS snapshots and
verifies the Exchange database via the backup and restore commands. For more information about
how to store data in a tape, see “Backing up a file system to tape” on page 253 or “Backing up storage
groups to tape” on page 414.
The following figure is an example of a system configuration where Application Agent uses VSS to
back up data.
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