What is stateful stream processing?

Arroyo is a stateful stream processing engine—which means that it's able to remember information about previously seen events, enabling features like joins, windows, and aggregations. When should you choose a stateless or a stateful streaming system? And how do stateful engines like Arroyo and Flink mitigate the difficulty of dealing with large amounts of state?

Micah Wylde

CEO of Arroyo