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Chengwei Wang edited comment on MAPREDUCE-7274 at 4/23/20, 2:55 AM: -------------------------------------------------------------------- Upload patch for hadoop 3.2.0. It enable us to set limit for running tasks when job is running by mapred client command: {code:bash} mapred job -set-running-task-limit JOB_ID TASK_TYPE LIMIT e.g. mapred job -set-running-task-limit job_1583809537551_21297 MAP 100 mapred job -set-running-task-limit job_1583809537551_21297 REDUCE 100 {code} it send a rpc resquest to AM, and AM would update the max running limit of the specified type task as specified limit count. was (Author: smarthan): Upload patch for hadoop 3.2.0. It enable us to set task running limit when job is running by mapred client command: {code:bash} mapred job -set-running-task-limit JOB_ID TASK_TYPE LIMIT e.g. mapred job -set-running-task-limit job_1583809537551_21297 MAP 100 mapred job -set-running-task-limit job_1583809537551_21297 REDUCE 100 {code} it send a rpc resquest to AM, and AM would update the max running limit of the specified type task as specified limit count. > 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-branch-3.2.0.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. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: mapreduce-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: mapreduce-issues-h...@hadoop.apache.org