Zongheng Yang created SPARK-2046:
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Summary: 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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