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From "Chengwei Wang (Jira)" <j...@apache.org>
Subject [jira] [Comment Edited] (MAPREDUCE-7274) Enable to limit running map and reduce tasks when job is running
Date Tue, 26 May 2020 07:10:00 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-7274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17116482#comment-17116482
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Chengwei Wang edited comment on MAPREDUCE-7274 at 5/26/20, 7:09 AM:
--------------------------------------------------------------------

delte patch for branch 3.2.0, and upload patch for trunk.

[^MAPREDUCE-7274.patch]


was (Author: smarthan):
upload patch for trunk.

[^MAPREDUCE-7274.patch]

> Enable to limit running map and reduce tasks when job is running
> ----------------------------------------------------------------
>
>                 Key: MAPREDUCE-7274
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7274
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: mr-am, mrv2
>            Reporter: Chengwei Wang
>            Priority: Major
>         Attachments: MAPREDUCE-7274.patch
>
>
> MRv2 enabled users to control the number of map or reduce tasks running simultaneously
by configuration  *_mapreduce.job.running.map.limit_* or _*mapreduce.job.running.reduce.limit*._
But users can only set limit number before submitting the job to rm. So, it's meaningful 
to enable users to set the limit of running map or reduce tasks when job is running, which
can help users to restrict  resource usage of job and give resources to high-priority job.



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