Managing Serviceguard Extension for SAP, December 2007

SGeSAP Cluster Administration
Chapter 6 297
6 SGeSAP Cluster Administration
SGeSAP clusters follow characteristic hardware and software setups. An
SAP application is no longer treated as though it runs on a dedicated
host. It is wrapped up inside one or more Serviceguard packages and
packages can be moved to any of the hosts that are inside of the
Serviceguard cluster. The Serviceguard packages provide a virtualization
layer that keeps the application independent of specific server hardware.
The virtualization is transparent in many aspects, but in some areas
special considerations apply. This affects the way a system gets
administered. Topics presented in this chapter include:
• Change Management
•Mixed Clusters
• Switching SGeSAP On and Off