zhengruifeng created SPARK-31182:
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Summary: PairRDD support aggregateByKeyWithinPartitions
Key: SPARK-31182
URL: https://issues.apache.org/jira/browse/SPARK-31182
Project: Spark
Issue Type: Improvement
Components: ML, Spark Core
Affects Versions: 3.1.0
Reporter: zhengruifeng
When implementing `RobustScaler`, I was looking for a way to guarantee that the
{{QuantileSummaries in {{}}{{aggregateByKey}}{{}}}} are compressed before
network communication.
Then I only found a tricky method to work around (however not applied), and
there was no method for this.
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