HP B6960-96035, Concepts Manual

Page: 82 / 422

A cluster-aware Data Protector Cell Manager that is responsible for running the IDB
and managing backup and restore operations has many major benefits over
non-cluster versions:
High availability of the Data Protector Cell Manager
All Cell Manager operations are always available since Data Protector services are
defined as cluster resources within the cluster and are automatically restarted when
a failover occurs.
Automatic restart of backups
Data Protector backup specifications that define the backup procedure can easily be
configured to be restarted in case of a failover of the Data Protector Cell Manager.
Restart parameters can be defined using the Data Protector GUI.
Load balancing at failover
A special command-line utility is provided for operations that allow backup sessions
to be aborted in case applications other than Data Protector perform a failover. The
Data Protector Cell Manager allows you to define what should happen in such
situations. If the backup is less important than the application, Data Protector can
abort running sessions. If the backup is more important or is just ending, Data Protector
can continue the sessions. For more information on how to define the criteria, see
the online Help index: "cluster, managing backups".
Cluster support
The Data Protector cluster support means the following:
• The Data Protector Cell Manager is installed in a cluster. Such a Cell Manager
is fault tolerant and can restart operations in the cell automatically after the failover.
NOTE:
If the Cell Manager is installed in the cluster, its cluster critical resources need to
be configured in the same cluster package or group as the application being
backed up, in order to automatically restart
failed backup sessions that failed
due to a failover. Otherwise, the failed backup sessions must be restarted
manually.
Planning your backup strategy 82