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https://issues.apache.org/jira/browse/TEZ-2914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15069370#comment-15069370
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Rajesh Balamohan commented on TEZ-2914:
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In most cases, concurrency would be set to -1 (as in disabled). If so, can
DAGScheduler lazily initialize vertexInfo (i.e when concurrency > 0) to avoid
lookups everytime?
> Ability to limit vertex concurrency
> -----------------------------------
>
> Key: TEZ-2914
> URL: https://issues.apache.org/jira/browse/TEZ-2914
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Jonathan Eagles
> Assignee: Bikas Saha
> Attachments: TEZ-2914.1.patch
>
>
> Add equivalent functionality of *MAPREDUCE-5583. Ability to limit running map
> and reduce tasks* in tez
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