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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5187) Provide an option to turn off priorities in jobs
Date Mon, 09 Feb 2009 05:39:02 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12671737#action_12671737
] 

Hemanth Yamijala commented on HADOOP-5187:
------------------------------------------

If I understand correctly, the fairshare scheduler currently globally orders its jobs (irrespective
of pools they belong too) based on the mode - fairshare/deficit based or fifo. Are you proposing
that we make the mode setting per pool ? This would consequently change the algorithm to maintain
job lists per pool as well, no ?

> Provide an option to turn off priorities in jobs
> ------------------------------------------------
>
>                 Key: HADOOP-5187
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5187
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/fair-share
>            Reporter: Hemanth Yamijala
>            Priority: Minor
>
> The fairshare scheduler can define pools mapping to queues (as defined in the capacity
scheduler - HADOOP-3445). When used in this manner, one can imagine queues set up to be used
by users who come from disparate teams or organizations (say a default queue). For such a
queue, it makes sense to ignore job priorities and consider the queue as strict FIFO, as it
is difficult to compare priorities of jobs from different users. 

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