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https://issues.apache.org/jira/browse/YARN-11752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17911124#comment-17911124
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ASF GitHub Bot commented on YARN-11752:
---------------------------------------

hadoop-yetus commented on PR #7277:
URL: https://github.com/apache/hadoop/pull/7277#issuecomment-2577865825

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   |  |   | 240m  1s |  |  |
   
   
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https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7277/1/artifact/out/Dockerfile
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   | GITHUB PR | https://github.com/apache/hadoop/pull/7277 |
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   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
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> Global Scheduler : Improve the container allocation time
> --------------------------------------------------------
>
>                 Key: YARN-11752
>                 URL: https://issues.apache.org/jira/browse/YARN-11752
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Syed Shameerur Rahman
>            Assignee: Syed Shameerur Rahman
>            Priority: Major
>              Labels: pull-request-available
>
> As part of YARN-10380, The allocation strategy for multi-mode/global 
> scheduler was changed from "node" list based to "partition" based, Due to 
> this change, After every two container allocation, the scheduler waits for *5 
> milli seconds* by default as mentioned 
> [here|[https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CapacityScheduler.java#L627].]
> This significantly affects the container throughput. YARN SLS benchmark shows 
> Async scheduling was *6x* better than Global scheduling in terms of container 
> throughput for scheduling 1600 container with 50 nodes.



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