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Posted to mapreduce-issues@hadoop.apache.org by "Chengwei Wang (Jira)" <ji...@apache.org> on 2020/06/11 06:34:00 UTC
[jira] [Commented] (MAPREDUCE-7274) Enable to limit running map and
reduce tasks when job is running
[ https://issues.apache.org/jira/browse/MAPREDUCE-7274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17132953#comment-17132953 ]
Chengwei Wang commented on MAPREDUCE-7274:
------------------------------------------
upload patch v002 to fix problems in building.[^MAPREDUCE-7274.002.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-7274.002.patch, 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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