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Posted to issues@tez.apache.org by "Zhiyuan Yang (JIRA)" <ji...@apache.org> on 2017/01/11 00:59:58 UTC

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

     [ https://issues.apache.org/jira/browse/TEZ-3573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zhiyuan Yang updated TEZ-3573:
------------------------------
    Attachment: TEZ-3573.1.patch

This patch requires auto grouping patch. Jenkins job would fail to compile.

> 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
>         Attachments: TEZ-3573.1.patch
>
>
> 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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