Using Serviceguard Extension for RAC, 2nd Edition, February 2005 Update

Table Of Contents
Introduction to Serviceguard Extension for RAC
Larger Clusters
Chapter 126
Larger Clusters
Serviceguard Extension for RAC supports clusters of up to 16 nodes. The
actual cluster size is limited by the type of storage and the type of volume
manager used.
Up to Four Nodes with SCSI Storage
You can configure up to four nodes using a shared F/W SCSI bus; for
more than 4 nodes, FibreChannel must be used. An example of a
four-node RAC cluster appears in the following figure.
Figure 1-5 Four-Node RAC Cluster
In this type of configuration, each node runs a separate instance of RAC
and may run one or more high availability packages as well.