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Posted to yarn-issues@hadoop.apache.org by "Haibo Chen (JIRA)" <ji...@apache.org> on 2018/05/04 19:36:01 UTC

[jira] [Updated] (YARN-8250) Create another implementation of ContainerScheduler to support NM overallocation

     [ https://issues.apache.org/jira/browse/YARN-8250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Haibo Chen updated YARN-8250:
-----------------------------
    Issue Type: Sub-task  (was: Improvement)
        Parent: YARN-1011

> Create another implementation of ContainerScheduler to support NM overallocation
> --------------------------------------------------------------------------------
>
>                 Key: YARN-8250
>                 URL: https://issues.apache.org/jira/browse/YARN-8250
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Haibo Chen
>            Assignee: Haibo Chen
>            Priority: Major
>
> YARN-6675 adds NM over-allocation support by modifying the existing ContainerScheduler and providing a utilizationBased resource tracker.
> However, the implementation adds a lot of complexity to ContainerScheduler, and future tweak of over-allocation strategy based on how much containers have been launched is even more complicated.
> As such, this Jira proposes a new ContainerScheduler that always launch guaranteed containers immediately and queues opportunistic containers. It relies on a periodical check to launch opportunistic containers. 



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