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https://issues.apache.org/jira/browse/MAPREDUCE-6548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15005817#comment-15005817
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Lin Yiqun commented on MAPREDUCE-6548:
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Hi [~bikassaha],I look through the jira YARN-1051.I think it tends to let jobs 
executed with the RM at admission control time.And these jobs guaranteed enough 
resources.But the main of my idea is to limit users/jobs and limit time-hours 
with a simple check in job-client. And it's not only for guaranteed the 
important jobs have enough resources, that's a satisfied scenario of this 
function.So I will have a users/time admission control and don't allowed the 
unsatisfied jobs to be submited to cluster. And this function is easy to be 
achieved in job-client rather than in YRAN.

> Jobs executed can be configurated with specific users and time hours
> --------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6548
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6548
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: job submission
>            Reporter: Lin Yiqun
>            Assignee: Lin Yiqun
>         Attachments: MAPREDUCE-6548.001.patch
>
>
> In recent hadoop versions,the system has no limitation for users to execute 
> their jobs if you don't configurate ACL.And I find that the ACL is only 
> called in IPC, isn't operated in job submissions.And this condition can't 
> satisfied with this case that I have a very important job, and I am prepared 
> to execute this job in 0 to 9 o'clock.In order to let this job executed 
> quickly, I am not allowed other user's job to execute in these time. So I can 
> see the result in tomorrow morning.So may be we can let jobs executed with 
> specific users in specific time hours.



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