[GitHub] [pulsar] lukestephenson commented on issue #6995: Decouple original topic and compacted topic retention policies

[GitBox <gi...@apache.org>]

lukestephenson commented on issue #6995:
URL: https://github.com/apache/pulsar/issues/6995#issuecomment-698032989


   Just came across https://streamnative.io/blog/tech/2020-07-08-pulsar-vs-kafka-part-1#topic-log-compaction:~:text=Topic%20(Log)%20Compaction which when I read it makes it sound like this is already supported.
   
   > By doing this, Pulsar allows for non-compacted data to have a retention policy, keeping control over unbounded growth, but still allowing periodic compaction to generate the most recent materialized view around. 
   
   However, this appears to conflict with what is stated in the pulsar docs:
   https://pulsar.apache.org/docs/en/concepts-topic-compaction/#__docusaurus:~:text=respect%20retention
   
   > Topic compaction does, however, respect retention. If retention has removed a message from the message backlog of a topic, the message will also not be readable from the compacted topic ledger.
   
   


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