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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-648) FS: Add documentation for pluggable policy
Date Thu, 06 Jun 2013 23:38:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13677664#comment-13677664
] 

Sandy Ryza commented on YARN-648:
---------------------------------

Looks great.  Two comments:

We should probably keep some mention to hierarchical queues in the introduction. Maybe add
on to the end of this sentence:
bq. Queues can be configured with weights to share the cluster non-evenly.
something like "and can be arranged in a hierarchy to subdivide resources within different
pools*.

bq. affecting the scheduling latencies in other queues.
What do you mean by latency? A policy that is compute-intensive can still slow down things
for everyone.  Would it be fair to say that it's more that we don't want to affect policies
that are working working out fairness-wise for other queues?
                
> FS: Add documentation for pluggable policy
> ------------------------------------------
>
>                 Key: YARN-648
>                 URL: https://issues.apache.org/jira/browse/YARN-648
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 2.0.4-alpha
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>              Labels: documentaion
>         Attachments: yarn-648-1.patch
>
>
> YARN-469 and YARN-482 make the scheduling policy in FS pluggable. Need to add documentation
on how to use this.

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