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https://issues.apache.org/jira/browse/IMPALA-7592?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Csaba Ringhofer updated IMPALA-7592:
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Labels: scheduler (was: scheduling)
> Planner should correctly estimate UnionNode host count
> ------------------------------------------------------
>
> Key: IMPALA-7592
> URL: https://issues.apache.org/jira/browse/IMPALA-7592
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Affects Versions: Impala 3.0
> Reporter: Balazs Jeszenszky
> Priority: Major
> Labels: scheduler
>
> Currently, the planner estimates UnionNode host count to be the maximum of
> all its children. In reality, scheduler will put these nodes on the union of
> its inputs' hosts. We should update the planner to correctly account for this
> behaviour.
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