Related terms
In a multi-node or clustered system, you may want certain system settings to apply only to one node, or only to a subset of the nodes in the cluster. For prconfig settings, a classification is a text value that groups those nodes that will share specific setting values.
For example, if your system contains three servers, you may want to have two support interactive browser-based users, and have the third node be dedicated to background agent processing. The most appropriate performance tuning settings for the background server will likely differ from those settings for the two foreground nodes.
In each of the two prconfig.xml files for the servers that will support interactive processing, you can indicate that they belong to the FOREGROUND classification. Then, through dynamic system settings, you can set values that will affect only those servers that have a FOREGROUND as the classification. These settings will not affect the background server.