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Posted to mapreduce-dev@hadoop.apache.org by "Chengwei Wang (Jira)" <ji...@apache.org> on 2020/04/15 15:51:00 UTC
[jira] [Created] (MAPREDUCE-7274) Enable to set running task limit
when mapreduce job is running
Chengwei Wang created MAPREDUCE-7274:
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Summary: Enable to set running task limit when mapreduce job is running
Key: MAPREDUCE-7274
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7274
Project: Hadoop Map/Reduce
Issue Type: New Feature
Reporter: Chengwei Wang
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, which can help users to restrict resource usage of job and give resources to high-priority job.
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