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It is recommended that the number of consumers in the same group be the same as the number of partitions in the topic to be consumed.

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Help Center/ MapReduce Service/ Developer Guide (Normal_Earlier Than 3.x)/ Kafka Application Development/ Development Specifications/ Suggestions

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Updated on 2022-09-14 GMT+08:00

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It is recommended that the number of consumers in the same group be the same as the number of partitions in the topic to be consumed.

If the number of consumers in a group is greater than the number of partitions in a topic, redundant consumers cannot consume messages in this topic. If the number of consumers is less than the number of partitions in a topic, the concurrent consumption cannot be fully reflected. Therefore, it is recommended that the number of consumers be the same as the number of partitions in a topic.

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