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https://issues.apache.org/jira/browse/SPARK-20589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16043877#comment-16043877
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Fei Shao commented on SPARK-20589:
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Tasks are assigned to executors. If we set the number of executors to 5 and set
the simulaneous task number to 2, a contradiction occurs here.
So can we change the requirement to "allow limiting task concurrency per
executor" please?
> Allow limiting task concurrency per stage
> -----------------------------------------
>
> Key: SPARK-20589
> URL: https://issues.apache.org/jira/browse/SPARK-20589
> Project: Spark
> Issue Type: Improvement
> Components: Scheduler
> Affects Versions: 2.1.0
> Reporter: Thomas Graves
>
> It would be nice to have the ability to limit the number of concurrent tasks
> per stage. This is useful when your spark job might be accessing another
> service and you don't want to DOS that service. For instance Spark writing
> to hbase or Spark doing http puts on a service. Many times you want to do
> this without limiting the number of partitions.
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