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https://issues.apache.org/jira/browse/PIG-3742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13947273#comment-13947273
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Cheolsoo Park commented on PIG-3742:
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Filed PIG-3835 for union followed by store.
> Set MR runtime settings on tez runtime
> --------------------------------------
>
> Key: PIG-3742
> URL: https://issues.apache.org/jira/browse/PIG-3742
> Project: Pig
> Issue Type: Sub-task
> Components: tez
> Reporter: Rohini Palaniswamy
> Assignee: Rohini Palaniswamy
> Fix For: tez-branch
>
> Attachments: PIG-3742-3.patch
>
>
> Classify whether a vertex is a map or reduce and set java.opts
> (mapreduce.map.java.opts or mapreduce.reduce.java.opts), memory.mb
> (mapreduce.map.memory.mb or mapreduce.reduce.memory.mb) and env
> (mapreduce.map.env or mapreduce.reduce.env) accordingly on the vertex. A
> simple thing would be to assume all root vertexes to be map vertexes and
> intermediate or leaf vertexes to be reduce vertexes.
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