vcrfxia opened a new pull request, #13292: URL: https://github.com/apache/kafka/pull/13292
(This PR is stacked on https://github.com/apache/kafka/pull/13274. Only the last commit needs to be reviewed separately.) This PR sets the correct topic configs for changelog topics for versioned stores introduced in [KIP-889](https://cwiki.apache.org/confluence/display/KAFKA/KIP-889%3A+Versioned+State+Stores). Changelog topics for versioned stores differ from those for non-versioned stores only in that `min.compaction.lag.ms` needs to be set in order to prevent version history from being compacted prematurely. The value for `min.compaction.lag.ms` is equal to the store's history retention plus some buffer to account for the broker's use of wall-clock time in performing compactions. This buffer is analogous to the `windowstore.changelog.additional.retention.ms` value for window store changelog topic retention time, and uses the same default of 24 hours. In the future, we can propose a KIP to expose a config such as `versionedstore.changelog.additional.compaction.lag.ms` to allow users to tune this value. ### Committer Checklist (excluded from commit message) - [ ] Verify design and implementation - [ ] Verify test coverage and CI build status - [ ] Verify documentation (including upgrade notes) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
