Systems and methods for regulating data traffic using active learning techniques. In one embodiment, a global monitor communicates with a plurality of sensors over a wide area network. The global monitor builds a global model for a data analytics service that maps elements to values based on data reported by the sensors. The global monitor generates a query for the data from the sensors, selects one or more candidate elements from the elements in the global model, generates a global policy specifying that the data requested from the sensors is limited to the data targeted to the candidate element(s), and sends the query indicating the global policy to the sensors. The global monitor receives the data targeted to the candidate element(s) from the sensors according to the global policy, and adjusts the global model based on the data targeted to the candidate element(s).