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Posted to issues@tez.apache.org by "Bikas Saha (JIRA)" <ji...@apache.org> on 2014/11/06 00:43:35 UTC

[jira] [Updated] (TEZ-1742) Improve response time of internal preemption

     [ https://issues.apache.org/jira/browse/TEZ-1742?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bikas Saha updated TEZ-1742:
----------------------------
    Attachment: TEZ-1742.1.patch

Attaching patch. [~rajesh.balamohan] [~sseth] Please review. The existing preemption test passes with the change.

> Improve response time of internal preemption
> --------------------------------------------
>
>                 Key: TEZ-1742
>                 URL: https://issues.apache.org/jira/browse/TEZ-1742
>             Project: Apache Tez
>          Issue Type: Task
>            Reporter: Bikas Saha
>            Assignee: Bikas Saha
>         Attachments: TEZ-1742.1.patch
>
>
> Tez YARN Task Scheduler currently preempts 1 running task at a time when a higher priority task is waiting and there are no available resources. When a large number of higher priority tasks are pending then it can take a long time to preempt the required number of lower priority tasks.



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