This graphic shows the farm, instance and cluster configuration. It depicts two instances within a cluster, and one instance that is part of the farm, but is not a cluster member. The cardinalities for each element are included: There may be 0...n application server instances in each farm, 0...n application server instances in each cluster, and 0...n clusters for each farm. There may be 1...n OC4J instances per application server instance, but only one OHS instance per application server instance. The DCM metadata repository is shown beside the farm, and it contains archives of the instance configurations.