Hi,

I filed a jira a few weeks ago around some log compaction ratio behavior we
were seeing. Now that the 0.11 vote done and release is out, I wanted to
follow up on it. Jira is here:
https://issues.apache.org/jira/projects/KAFKA/issues/KAFKA-5452.

Details are in the jira, but long story short, after much testing, we were
seeing that aggressive log compaction ratios were performing just as well
as more conservative ratios. Fundamentally I would expect there to be some
sort of hit, but seeing that the data shows there wasn't, we wanted to
raise this to the rest of the community and see if anyone else has observed
similar behavior. The motivation behind this is to see if we might consider
changing the default from 0.5. This could help in preventing confusion
around duplicate keys in low volume log-compacted topics use cases.

Thanks,

Jeff Chao
Heroku Kafka

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