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https://issues.apache.org/jira/browse/TEZ-724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13872971#comment-13872971
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Bikas Saha commented on TEZ-724:
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Users could choose to not specify the edge manager because they will override
it at runtime. Or they could choose to specify a custom edge manager that does
their custom routing.
> DAG API to specify and add a custom data movement edge
> ------------------------------------------------------
>
> Key: TEZ-724
> URL: https://issues.apache.org/jira/browse/TEZ-724
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Bikas Saha
> Assignee: Siddharth Seth
>
> We will need a CUSTOM data movement type enum. Also, optionally, a user
> should be able to specify a custom edge manager to route using custom logic.
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