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From "Zhiyuan Yang (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (TEZ-3816) Ability to automatically speculate single-task vertices
Date Fri, 05 Jan 2018 00:18:20 GMT

     [ https://issues.apache.org/jira/browse/TEZ-3816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhiyuan Yang closed TEZ-3816.
-----------------------------

> Ability to automatically speculate single-task vertices
> -------------------------------------------------------
>
>                 Key: TEZ-3816
>                 URL: https://issues.apache.org/jira/browse/TEZ-3816
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: Muhammad Samir Khan
>            Assignee: Muhammad Samir Khan
>             Fix For: 0.9.1
>
>         Attachments: TEZ-3816.001.patch, TEZ-3816.002.patch, TEZ-3816.003.patch
>
>
> When a single-task vertex is unlucky, it lands on a very slow node. Speculation doesn't
currently apply when there are no other tasks to compare with. It would be good to have a
configurable timeout after which the tasks automatically speculate.



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