kennknowles opened a new issue, #19089: URL: https://github.com/apache/beam/issues/19089
The goal is to reduce the number of value sent to a single post-GBK worker. If combiner lifting happens, each bundle will sends a single value per sub-key, causing an N-fold blowup in shuffle data and N reducers with the same amount of data to consume as the single reducer in the non-fanout case. Imported from Jira [BEAM-4565](https://issues.apache.org/jira/browse/BEAM-4565). Original Jira may contain additional context. Reported by: robertwb. -- 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]
