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Comment: Add one specific use case in the motivation section.

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  1. Traffic analysis. It allows detailed analysis of traffic on particular topics, for particular principles, or for specific request types. Useful information could be derived from the audit information. For example, user can easily figure out what topics have not been accessed for some certain period of time. With this information, users can initiate some topic deletion process and etc.

  2. Correctness analysis and reporting. There could be various definitions on “correctness”. For example, “correctness” could be defined as whether the number of records produced to a Kafka cluster equals the number of records that is mirrored to another cluster.

  3. SLO monitoring. The response time to a request could be broken down by topic, principle or any other arbitrary criteria.

  4. Cost attribution. For example, the number of bytes produced or consumed could be broken down by topic, principle or any other arbitrary criteria.

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