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Tivoli Storage Manager for UNIX Backup-Archive Clients Installation and User's Guide


Appendix B. Configuring the Backup-Archive Client in an HACMP Takeover Environment

High Availability Cluster Multi Processing (HACMP) allows scheduled Tivoli Storage Manager client operations to continue processing during a failover situation.

For example, a scheduled incremental backup of a clustered volume is running on machine-a. A situation causes the CAD to failover to machine-b. machine-b then reconnects to the server. If the reconnection occurs within the start window for that event, the scheduled command is restarted. This scheduled incremental backup will reexamine files sent to the server before the failover. The backup will then "catch up" to where it terminated before the failover situation.

If a failover occurs during a user initiated client session, the Tivoli Storage Manager client acceptor daemon (CAD) starts on the node that is handling the takeover. This allows it to process scheduled events and provide Web client access. You can install Tivoli Storage Manager locally on each node of an HACMP environment. You can also install and configure the Tivoli Storage Manager Scheduler Service for each cluster node to manage all local disks and each cluster group containing physical disk resources.

The clusternode option determines if you want the Tivoli Storage Manager client to back up cluster resources and participate in cluster failover for high availability. See Clusternode for more information.

The following software is required:

The HACMP Cluster Information Daemon must also be running.


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