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https://issues.apache.org/jira/browse/SPARK-27651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16834832#comment-16834832
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Attila Zsolt Piros commented on SPARK-27651:
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I am already working on this.
> Avoid the network when block manager fetches shuffle blocks from the same host
> ------------------------------------------------------------------------------
>
> Key: SPARK-27651
> URL: https://issues.apache.org/jira/browse/SPARK-27651
> Project: Spark
> Issue Type: Improvement
> Components: Block Manager
> Affects Versions: 3.0.0
> Reporter: Attila Zsolt Piros
> Priority: Major
>
> When a shuffle block (content) is fetched the network is always used even
> when it is fetched from an executor (or the external shuffle service) running
> on the same host.
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