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Posted to issues@tez.apache.org by "Zhiyuan Yang (JIRA)" <ji...@apache.org> on 2017/01/10 22:07:58 UTC

[jira] [Created] (TEZ-3573) Allow user to cap number of task in cartesian product (unpartitioned case)

Zhiyuan Yang created TEZ-3573:
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             Summary: Allow user to cap number of task in cartesian product (unpartitioned case)
                 Key: TEZ-3573
                 URL: https://issues.apache.org/jira/browse/TEZ-3573
             Project: Apache Tez
          Issue Type: Sub-task
            Reporter: Zhiyuan Yang
            Assignee: Zhiyuan Yang


Auto grouping can help reduce #tasks in cartesian product but may still result in too many tasks in case of huge input data. It will be useful for user to cap #task, so that cartesian product won't abuse available resource. The primary limiter will still be auto grouping, but this will be a hard limit which cannot be exceeded anyway.



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