Managing Serviceguard Extension for SAP Version B.05.10, December 2012

Figure 5 Replicated Enqueue Clustering for ABAP and JAVA Instances
Figure 1-5 shows an example configuration. The dedicated failover host can serve many purposes
during normal operation. With the introduction of Replicated Enqueue Servers, it is a good practice
to consolidate a number of Replicated Enqueues on the dedicated failover host.
These replication units can be halted at any time without disrupting ongoing transactions for the
systems they belong to. They are sacrificed in emergency conditions when a failing database
and/or Central Service Instance need the spare resources.
18 Designing SGeSAP Cluster Scenarios