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Posted to issues@tez.apache.org by "Muhammad Samir Khan (JIRA)" <ji...@apache.org> on 2017/06/22 21:45:00 UTC

[jira] [Updated] (TEZ-3772) Allow slowstart for small vertices to be treated differently

     [ https://issues.apache.org/jira/browse/TEZ-3772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Muhammad Samir Khan updated TEZ-3772:
-------------------------------------
    Summary: Allow slowstart for small vertices to be treated differently  (was: Allow slowstart for small jobs to be treated differently)

> Allow slowstart for small vertices to be treated differently
> ------------------------------------------------------------
>
>                 Key: TEZ-3772
>                 URL: https://issues.apache.org/jira/browse/TEZ-3772
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: Muhammad Samir Khan
>            Assignee: Muhammad Samir Khan
>         Attachments: tez-3772.001.patch
>
>
> If there are a small number of reduces (configurable), then having a different threshold can benefit. Performance of jobs with a small number of reduce tasks can benefit significantly. Yes, the job could specify slowstart as 0.0 instead of the default, but that requires job owners to do something. It would be better if the defaults did something more optimal for both large and small jobs.



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