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Data & Analytics · Intermediate

Kafka Topic

A named, partitioned, append-only log in Kafka to which producers write and from which consumers read.

Definition

Topics are split into partitions for parallelism. Records with the same key go to the same partition, which preserves per-key order. Retention is configured by time or size, and log compaction keeps the latest value per key.

Exam tip

To keep events for one customer in order, use the customer ID as the message key.

Related terms