Implementation

Kafka implementation internals for data storage, records, networking, and offset tracking.

Network Layer

Kafka NIO-based network layer implementation.

Messages

Kafka message structure, including headers and opaque key/value payloads.

Message Format

The on-disk binary formats for Kafka record batches and records.

Log

Kafka log storage format and segment management.

Distribution

Kafka consumer offset tracking via the group coordinator.

Last modified October 22, 2026: MINOR: Add 4.4 release (#925) (b70dc484a2)