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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4211) Capacity Scheduler does not divide queue resources properly among users, when jobs are submitted one after other.
Date Mon, 22 Sep 2008 17:10:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12633385#action_12633385
] 

Owen O'Malley commented on HADOOP-4211:
---------------------------------------

There isn't preemption between users in the same queue. Did you observe J1 getting more map
slots after J2 was submitted, but before J2 reached 50%? And similarly for the second case?

> Capacity Scheduler does not divide queue resources properly among users, when jobs are
submitted one after other.
> -----------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-4211
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4211
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/capacity-sched
>    Affects Versions: 0.19.0
>         Environment: Mapred Cluster capacity with 204 Maps and 204 Reduces. User limit
=25% and only one queue.
>            Reporter: Karam Singh
>            Assignee: Hemanth Yamijala
>            Priority: Blocker
>             Fix For: 0.19.0
>
>
> Capacity Scheduler does not divide queue resources  properly among users, when job are
submitted one after other. E.g. user limit =25. Say User1's job is running. Then user2 submits
a job. Then user1's job uses 75% and user2's job 25%=user limit.

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