Using Serviceguard Extension for RAC, 6th Edition, April 2008

2 can now access both Package 1’s disk and Package 2’s disk. Oracle instance 2 now
handles all database access, since instance 1 has gone down.
Figure 1-4 After Node Failure
In the above figure, pkg1 and pkg2 are not instance packages. They are shown to
illustrate the movement of packages in general.
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.
Larger Clusters 31