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https://issues.apache.org/jira/browse/TEZ-3816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Muhammad Samir Khan updated TEZ-3816:
-------------------------------------
    Description: 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.  (was: 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 either have a configurable 
timeout after which the tasks automatically speculate.)

> 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
>         Attachments: TEZ-3816.001.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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