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https://issues.apache.org/jira/browse/SPARK-3174?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sandy Ryza updated SPARK-3174:
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Attachment: SPARK-3174design.pdf
> Under YARN, add and remove executors based on load
> --------------------------------------------------
>
> Key: SPARK-3174
> URL: https://issues.apache.org/jira/browse/SPARK-3174
> Project: Spark
> Issue Type: Improvement
> Components: YARN
> Affects Versions: 1.0.2
> Reporter: Sandy Ryza
> Assignee: Andrew Or
> Attachments: SPARK-3174design.pdf
>
>
> A common complaint with Spark in a multi-tenant environment is that
> applications have a fixed allocation that doesn't grow and shrink with their
> resource needs. We're blocked on YARN-1197 for dynamically changing the
> resources within executors, but we can still allocate and discard whole
> executors.
> I think it would be useful to have some heuristics that
> * Request more executors when many pending tasks are building up
> * Request more executors when RDDs can't fit in memory
> * Discard executors when few tasks are running / pending and there's not much
> in memory
> Bonus points: migrate blocks from executors we're about to discard to
> executors with free space.
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