Installation guide

8 Chapter 1:Introduction to Red Hat Cluster Manager
Figure 1–1 Example Cluster
Figure 1–1, Example Cluster shows an example of a cluster in an active-active configuration.
If a hardware or software failure occurs, the cluster will automatically restart the failed system’s ser-
vices on the functional cluster system. This service failover capability ensures that no data is lost,
and there is little disruption to users. When the failed system recovers, the cluster can re-balance the
services across the two systems.
In addition, a cluster administrator can cleanly stop the services running on a cluster system and then
restart them on the other system. This service relocation capability enables the administrator to main-
tain application and data availability when a cluster system requires maintenance.