Kafka made event streaming practical at scale. Pushing data processing into the streaming platform creates recovery, scaling, and isolation problems in production. Vendor documentation, Kafka improvement proposals, and migration case studies point to the same architectural boundary: streaming platforms handle durable transport, processing engines handle state and checkpoints. Separating them leads to systems that scale and recover cleanly. Kafka changed the industry by making event streaming practical at scale. Durable logs, ordering, fan-out, and backpressure turned event-driven systems from fragile prototypes into mainstream infrastructure. Where things get messy is when teams push data processing into the streaming platform itself: Kafka Streams, ksqlDB, broker-side transforms. It starts as convenience and ends as operational coupling. Not because engineers are doing it wrong, but because the streaming layer and the processing layer solve different problems. The evid...
novatechflow | Alexander Alten
Fractional Chief Architect for Big Data Systems & Distributed Data Processing