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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8820) Backport HADOOP-8469 and HADOOP-8470: add "NodeGroup" layer in new NetworkTopology (also known as NetworkTopologyWithNodeGroup)
Date Tue, 13 Nov 2012 10:48:12 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13496093#comment-13496093
] 

Junping Du commented on HADOOP-8820:
------------------------------------

Hi,Jing. You are right that firstGrandChild is not checked before, I was thinking you are
talking about firstChild. Also, the 4 methods you are listing here is just replicated. I already
address your comments in v4 patch in HADOOP-8817. Thanks!
                
> Backport HADOOP-8469 and HADOOP-8470: add "NodeGroup" layer in new NetworkTopology (also
known as NetworkTopologyWithNodeGroup)
> -------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-8820
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8820
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: net
>    Affects Versions: 1.0.0
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: HADOOP-8820.b1.002.patch, HADOOP-8820.b1.003.patch, HADOOP-8820.patch
>
>
> This patch backport HADOOP-8469 and HADOOP-8470 to branch-1 and includes:
> 1. Make NetworkTopology class pluggable for extension.
> 2. Implement a 4-layer NetworkTopology class (named as NetworkTopologyWithNodeGroup)
to use in virtualized environment (or other situation with additional layer between host and
rack).

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