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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2020/11/17 07:39:13 UTC

[GitHub] [spark] mridulm commented on pull request #30392: [SPARK-33465][CORE] RDD.takeOrdered should get rid of usage of reduce or use treeReduce instead

mridulm commented on pull request #30392:
URL: https://github.com/apache/spark/pull/30392#issuecomment-728746062


   I am not sure I follow - the `reduce` will reduce it at driver - based on the individual priority queues per partition - while `treeReduce` will progressively reduce it in executors before pulling final pq result to driver.
   What is the concern here ?


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