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https://issues.apache.org/jira/browse/IMPALA-8125?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong updated IMPALA-8125:
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Labels: multithreading (was: )
> Limit number of files generated by unpartitioned insert
> -------------------------------------------------------
>
> Key: IMPALA-8125
> URL: https://issues.apache.org/jira/browse/IMPALA-8125
> Project: IMPALA
> Issue Type: Sub-task
> Components: Frontend
> Reporter: Tim Armstrong
> Priority: Major
> Labels: multithreading
>
> One pitfall of multithreaded execution is that, if implemented naively, the
> number of files generated by an unpartitioned insert will be multiplied by
> mt_dop.
> We should provide a mechanism to limit the number of files generated, e.g.
> limit the number of insert fragment instances (note that there a pre-existing
> problem with unpartitioned inserts generating too many files).
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