https://medium.com/@mousavi310/log-compacted-topics-in-apache-kafka-b1aa1e4665a7 > When I had begun reading Kafka documentation, although log compacted topic seemed a simple concept, it wasn’t clear to me how internally Kafka keeps the states of them in the file system. This month I had some time to read more about this feature and I want to share my understandings with you. > In this article, I will describe the log compacted topics in Kafka. Then I will show you how Kafka internally keeps the states of these topics in the file system.