Dandandan opened a new issue, #2314: URL: https://github.com/apache/datafusion-ballista/issues/2314
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** Partial-reduce applies a second agreggation to already aggregated results, often significantly reducing the shuffle size for aggregations - significantly reducing shuffle write / read costs. **Describe the solution you'd like** Add partial reduce to the stages that further reduces aggregation. This can be implemented by applying a repartioning + partial reduce in the same stage. A threshold probably has to be added to avoid slowing down almost-unique inputs. **Describe alternatives you've considered** **Additional context** -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
