Managing Serviceguard Extension for SAP on Linux (IA64 Integrity and x86_64), February 2008

Serviceguard Extension for SAP on Linux Cluster Administration
Change Management
Chapter 5 215
using relocatable names to fill in the hostname field, the instance will -
after a failover and under control of CCMS - continue to work without a
change
NOTE If an instance is running on the standby node in normal operation and is
stopped during the switchover.
Only configure the update service on a node for SAP application services
running on the same node. The result is, the remaining servers, running
on different nodes, are not affected by the outage of the update server.
However, if the update server is configured to be responsible for
application servers running on different nodes, any failure of the update
server leads to subsequent outages at these nodes. Therefore configure
the update server on a clustered instance. The use of local update servers
should only be considered, if performance issues require it.