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From "Yiping Han (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5187) Provide an option to turn off priorities in jobs
Date Wed, 11 Feb 2009 08:03:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12672542#action_12672542

Yiping Han commented on HADOOP-5187:

Regarding distribution of excess capacity. Should we have a priority mode between queues.
Say, queues are given priorities, so when there are excess capacity, they are given to the
queues with highest priority first.

I agree with Vinod, this should be made pluggable.

> 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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