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From "Siddharth Seth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-752) In AMRMClient, automatically add corresponding rack requests for requested nodes
Date Fri, 07 Jun 2013 18:06:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13678228#comment-13678228
] 

Siddharth Seth commented on YARN-752:
-------------------------------------

Can we make this rack resolution optional
1) If the user has provided racks - just trust that information instead of resolving and then
checking whether the user has provided the correct information.
2) Does it make sense to have an option to disable this automatic resolution. I haven't been
following the whitelisting / blacklisting closely - but isn't it possible for users to ask
for specific hosts, without specifying racks (Ignoring scheduler implementation here)
                
> In AMRMClient, automatically add corresponding rack requests for requested nodes
> --------------------------------------------------------------------------------
>
>                 Key: YARN-752
>                 URL: https://issues.apache.org/jira/browse/YARN-752
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: api, applications
>    Affects Versions: 2.0.4-alpha
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>         Attachments: YARN-752-1.patch, YARN-752-1.patch, YARN-752.patch
>
>
> A ContainerRequest that includes node-level requests must also include matching rack-level
requests for the racks that those nodes are on.  When a node is present without its rack,
it makes sense for the client to automatically add the node's rack.

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