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https://issues.apache.org/jira/browse/KAFKA-7224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17097040#comment-17097040
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Matthias J. Sax commented on KAFKA-7224:
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Thanks for clarification. I missed the point that you can allow `suppress()` to
also emit if the buffer is full. For this case, having a larger buffer could
help to reduce intermediate results. My bad.
About KIP-428: I am not sure atm what was proposed, but I agree that only a
pure wall-clock-time emit strategy does make sense to have a good rate control.
Btw: I think [~vvcephei] actually work on RocksDB support for suppress() but
the performance was pretty bad and he never finished it.
In any case: If you really need a feature and nobody is working on it, feel
free to pick it up. Kafka is an open source project after all.
> KIP-328: Add spill-to-disk for Suppression
> ------------------------------------------
>
> Key: KAFKA-7224
> URL: https://issues.apache.org/jira/browse/KAFKA-7224
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: John Roesler
> Priority: Major
>
> As described in
> [https://cwiki.apache.org/confluence/display/KAFKA/KIP-328%3A+Ability+to+suppress+updates+for+KTables]
> Following on KAFKA-7223, implement the spill-to-disk buffering strategy.
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