Robin Moffatt • 9/8/2020

Counting the number of messages in a Kafka topic

This technical article details how to count messages in an Apache Kafka topic. It first shows a simple but potentially inefficient method using kafkacat piped to wc. It then demonstrates a more powerful approach using ksqlDB to create a stream, define a schema, and perform SQL-based counts, including grouping by message fields and observing real-time updates.

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#Kafka #Data Streaming #Kafkacat