Table 4: Message type definition.

ValueMsg_TypeAttribute listDescription

1SUB_STARTSubscribe for gathering performance data from specified node
2SUB_STOPStop subscribing to specified node
3QUERY_ONCESingle query of performance measures from specified node
4DATA List of performance measures from specified node
5MOVE_NODEx_coord, y_coord, z_coordMove specified node to specified location
6ADD_NODEcluster_id, x_coord, y_coord, z_coordAdd a new node at specified location
7DEL_NODEDelete the specified node
8ACK_MOVE_NODEx_coord, y_coord, z_coordAcknowledge the command to move specified node