Using Configuration Parameters in a Clustered Environment

In the Cluster Edition, SAP supports both cluster-wide and instance-specific configuration.

Cluster-wide configuration parameters are applied to all instances in the cluster. Local configuration parameters are applied only to a specified instance.
The cluster configuration file includes an instance-specific configuration block. Parameter settings in the instance-specific block override cluster-wide settings. For example:
max online engines = DEFAULT

max online engines = 5
max online engines = 3

See the Clusters Users Guide.