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For some usages, i.e., join windows in Kafka Streams, it is desirable to have logs that are both compacted and deleted. In these types of applications you may have windows of time with many versions of key, during the window you only want to retain the latest version of the key, however once the window has expired you would like to have the segments for the window deleted. With compact_and_delete enabled retention.ms of the changelog would be set to a value greater than the retention of the window. Although old windows wont automatically be removed on expiration they will eventually be removed by the broker as the old segments expire. Kafka doesn’t currently support these semantics as compaction and deletion are exclusive.

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