Programmer DD

Jan 13, 2020 · Backend Development

How Kafka’s Broker Controller Keeps Your Data Flowing – Inside the Replication Engine

This article dives deep into Kafka’s internal mechanics, explaining how brokers replicate data, how the controller coordinates the cluster via ZooKeeper, the roles of leader and follower replicas, ISR management, request handling, fail‑over strategies, and consumer group rebalancing, all illustrated with diagrams.