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.

Local configuration overrides cluster-wide configuration.
If an instance-specific configuration has not been applied, the cluster-wide configuration applies.
Some parameters, such as default character set id, cannot be applied to a specific instance. These parameters can only be used over an entire cluster.

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

[Instance:ase1]
max online engines = 5
[Instance:ase2]
max online engines = 3

See the Clusters Users Guide.