Managing HP Serviceguard Extension for SAP for Linux, December 2013

You can implement “Starting and stopping the primary HANA system” (page 33) and “Starting
and stopping of the secondary HANA system” (page 33) in full role-reversal operation mode
also.
3. To failback perform:
If 1 and 2 are repeated with the primary and secondary nodes reversed, a manual failback
is possible, and then the nodes will be back to their original state. Such a failback operation
is desirable in an environment that is not symmetric. For example, if the client connectivity of
the second node has significantly higher latency due to larger distance or if the second node
is a Dual-purpose node that can run additional non-production systems.
3.7.4 Planned extended downtime for HANA instance
SGeSAP HANA package types (primary and secondary packages) support the Serviceguard
Package Maintenance Mode. Package Maintenance Mode temporarily disables failover and
monitoring for an active package. This allows extended administration operations for the HANA
instance without the risk of causing a failover. The feature allows deactivation of the production
instance cluster monitoring without the need to stop the instance. This feature is not HANA-specific.
For additional information on HP Serviceguard, see Managing HP Serviceguard A.11.20.20 for
Linux.
3.7.5 Patching Serviceguard software on a node
SGeSAP HANA package types (primary and secondary) support the Serviceguard LAD (Live
Application Detach) which allows stopping a Serviceguard cluster node without the need to bring
down the applications. This feature allows patching the Serviceguard software on the node without
the need to stop the instance. This feature is not HANA-specific. For additional information on HP
Serviceguard, see Managing HP Serviceguard A.11.20.20 for Linux.
3.7 SAP HANA cluster administration 35