Index this, index that. How does Kafka do it?Almost every Kafka topic runs with index.interval.bytes at its default, and the docs tell you not to worry … Sep 27, 2026 · 15 min The batch is the unit: what Kafka actually writes to diskKafka's API hands you one message at a time, so it's natural to assume one message is what gets stored. It … Sep 20, 2026 · 14 min