Only single-instance applications are supported in
an Enhanced Distance Cluster configuration. Multi-instance
applications that use the cluster interconnect for communication
between multiple instances, such as ORACLE RAC, are not
recommended in a Enhanced Distance Cluster configuration.
This is due to increased latency on the cluster interconnect.
For example, ORACLE RAC uses a cluster interconnect for
its own lock manager traffic and an increase in latency
could lead to unpredictable results.
multi-instance applications can increase the burden on
the cluster interconnect and affect inter-member cluster
communication so should follow the configuration recommendations
in the next section.