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https://issues.apache.org/jira/browse/SPARK-20589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15995550#comment-15995550
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Mridul Muralidharan commented on SPARK-20589:
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coalasce with shuffle=false might be a workaround if source is already
persisted ?
(I see the benefit of the jira, just wondering if this will unblock you !)
> 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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