[jira] [Commented] (SPARK-2046) Support config properties that are changeable across tasks/stages within a job

["Zongheng Yang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-2046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14019457#comment-14019457 ] 

Zongheng Yang commented on SPARK-2046:
--------------------------------------

[~shivaram]

> Support config properties that are changeable across tasks/stages within a job
> ------------------------------------------------------------------------------
>
>                 Key: SPARK-2046
>                 URL: https://issues.apache.org/jira/browse/SPARK-2046
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>            Reporter: Zongheng Yang
>
> Suppose an application consists of multiple stages, where some stages contain computation-intensive tasks, and other stages contain less computation-intensive (or otherwise ordinary) tasks. 
> For such job to run efficiently, it might make sense to provide user a function to set "spark.task.cpus" to a high number right before the computation-intensive stages/tasks are getting generated in the user code, and set the property to a lower number for other stages/tasks.
> As a first step, supporting this feature across stages instead of the more fine-grained task-level might suffice. 



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