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https://issues.apache.org/jira/browse/SPARK-1767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14069653#comment-14069653
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Colin Patrick McCabe commented on SPARK-1767:
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[~pwendell], [~kayousterhout]: yeah, you're right. The order in
{{preferredLocations}} doesn't matter here. I think we need to pass back some
more information through this API to the scheduler. I believe we can do this
by using a short string prefix. If it contains an underscore, it won't be
possible to confuse it with a valid hostname. This will avoid creating
compatibility problems, I believe.
> Prefer HDFS-cached replicas when scheduling data-local tasks
> ------------------------------------------------------------
>
> Key: SPARK-1767
> URL: https://issues.apache.org/jira/browse/SPARK-1767
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.0.0
> Reporter: Sandy Ryza
>
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