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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-45) [Preemption] Scheduler feedback to AM to release containers
Date Tue, 13 May 2014 21:23:17 GMT

     [ https://issues.apache.org/jira/browse/YARN-45?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinod Kumar Vavilapalli updated YARN-45:
----------------------------------------

    Summary: [Preemption] Scheduler feedback to AM to release containers  (was: Scheduler
feedback to AM to release containers)

> [Preemption] Scheduler feedback to AM to release containers
> -----------------------------------------------------------
>
>                 Key: YARN-45
>                 URL: https://issues.apache.org/jira/browse/YARN-45
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: Chris Douglas
>            Assignee: Carlo Curino
>             Fix For: 2.1.0-beta
>
>         Attachments: YARN-45.1.patch, YARN-45.patch, YARN-45.patch, YARN-45.patch, YARN-45.patch,
YARN-45.patch, YARN-45.patch, YARN-45_design_thoughts.pdf
>
>
> The ResourceManager strikes a balance between cluster utilization and strict enforcement
of resource invariants in the cluster. Individual allocations of containers must be reclaimed-
or reserved- to restore the global invariants when cluster load shifts. In some cases, the
ApplicationMaster can respond to fluctuations in resource availability without losing the
work already completed by that task (MAPREDUCE-4584). Supplying it with this information would
be helpful for overall cluster utilization [1]. To this end, we want to establish a protocol
for the RM to ask the AM to release containers.
> [1] http://research.yahoo.com/files/yl-2012-003.pdf



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