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https://issues.apache.org/jira/browse/TEZ-1190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15685103#comment-15685103
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Zhiyuan Yang commented on TEZ-1190:
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Shared output edge is similar to group input edge. In unnamed edge case, they
will just work as before. In named edge case, existing API cannot work because
they explode into multiple normal edge without name. It's possible to make them
work, but we need new API of creating named shared/group edge, and I'm not
clear what new API should look like.
> Allow multiple edges between two vertices
> -----------------------------------------
>
> Key: TEZ-1190
> URL: https://issues.apache.org/jira/browse/TEZ-1190
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Daniel Dai
> Assignee: Zhiyuan Yang
> Attachments: NamedEdgeDesign.pdf, TEZ-1190.prototype.patch
>
>
> This will be helpful in some scenario. In particular example, we can merge
> two small pipelines together in one pair of vertex. Note it is possible the
> edge type between the two vertexes are different.
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