No real-time insight without real-time data ingestion. No real-time data ingestion without NiFi ! Apache NiFi is an integrated platform for data flow management at entreprise level, enabling companies to securely acquire, process and analyze disparate sources of information (sensors, logs, files, etc) in real-time. NiFi helps data engineers accelerate the development of data flows thanks to its UI and a large number of powerful off-the-shelf processors. However, with great power comes great responsibilities. Behind the simplicity of NiFi, best practices must absolutely be respected in order to scale data flows in production & prevent sneaky situations. In this joint presentation, Hortonworks and Renault, a French car manufacturer, will present lessons learnt from real world projects using Apache NiFi. We will present NiFi design patterns to achieve high level performance and reliability at scale as well as the process to put in place around the technology for data flow governance. We will also show how these best practices can be implemented in practical use cases and scenarios.