ChenjunZou commented on issue #28168: [SPARK-31395][CORE]reverse preferred 
location to make schedule more even
URL: https://github.com/apache/spark/pull/28168#issuecomment-611482347
 
 
   > Hi @ChenjunZou , you can disable `spark.shuffle.reduceLocality.enabled` if 
you don't want locality prefer scheduling.
   > 
   > Or you may consider about some certain workloads where throughput is 
affected by delay scheduling? If so, you may interested at this PR #27207.
   
   thanks for reminding me that, I will watch the pr.

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