Large and high-speed networks produce a large number of flows that need to be collected and analyzed. Most collectors are unable to keep up with the flow export rate, and also have severe speed limitations when creating reports, due to the amount of data that needs to be analyzed. This tutorial shows how recent innovation in databases, combined with existing open-source software applications, allow flow collection and exploration of large-scale flows to become feasible. Furthermore the use of web 2.0 technologies enable network administrators to analyze collected data in real-time and explore it interactively by means of a web browser