When there is an outage on the Tivoli® Storage
Manager server, Data Protection for IBM® Domino® can
fail over to a secondary server for data recovery operations.
The Tivoli Storage
Manager server
that Data Protection for IBM Domino connects
to for backup operations is called the primary server.
When the primary server, Data Protection for IBM Domino node,
and the Tivoli Storage
Manager backup-archive
client node are set up for node replication on the primary server,
the nodes can be replicated to another Tivoli Storage
Manager server,
called the secondary server.
During normal operations, connection information for the secondary server is
automatically sent to Data Protection for IBM Domino from
the primary server.
The secondary server information
is saved to the client options files on the Data Protection for IBM Domino node
and the backup-archive client node. No manual intervention is required
by you to add the information for the secondary server.
Each time the backup-archive client logs on to the server for backup
services, it attempts to contact the primary server.
If the primary server is
unavailable, the backup-archive client automatically fails over to
the secondary server.
In failover mode, you can restore data that was replicated to the secondary server.
When the primary server is
online again, the backup-archive client automatically fails back to
the primary server the
next time the backup-archive client connects to the server.
You can confirm that Data Protection for IBM Domino has
failed over by looking for entries about the secondary server in
the dsierror.log file.
Requirements: To ensure that automated
client failover can occur,
Data Protection for IBM Domino must
meet the following requirements:
- Data Protection for IBM Domino must
be at the V7.1 level.
- The primary server, secondary server,
and backup-archive client must be at the V7.1 level.
- The primary and secondary servers must be set up for node replication.
- The Data Protection and backup-archive client nodes must be configured
for replication with the replstate=enabled option
in each node definition on the server.
- Before the connection information for the secondary server can
be sent to Tivoli Storage FlashCopy® Manager,
the following processes must occur:
- You must back up data at least one time to the primary server.
- The Data Protection for IBM Domino node
on the primary server must
be replicated at least one time to the secondary server.
Restriction: The following restrictions apply to
Data Protection for IBM Domino during
failover:
- Any operation that requires data to be stored on the Tivoli Storage
Manager server,
such as backup operations, are not available. You can use only data
recovery functions, such as restore or query operations.
- Schedules are not replicated to the secondary server.
Therefore, schedules are not run while the primary server is
unavailable.
- If the primary server goes
down before or during node replication, the most recent backup data
is not successfully replicated to the secondary server.
The replication status of the file space is not current. If you attempt
to restore data in failover mode and the replication status is not
current, the recovered data might not be usable. You must wait until
the primary server comes
back online before you can restore the data.
- For more information about the failover capabilities of Tivoli Storage
Manager components,
see http://www.ibm.com/support/docview.wss?uid=swg21649484.
For more information about automated client failover with the Tivoli Storage
Manager backup-archive
client, see Automated client failover configuration and use in
the Tivoli Storage
Manager information
center.