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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1266) Remove DatanodeDescriptor dependency from NetworkTopology
Date Sat, 08 Sep 2007 02:44:31 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12525883
] 

Hadoop QA commented on HADOOP-1266:
-----------------------------------

+1

http://issues.apache.org/jira/secure/attachment/12365303/GenericTopology.patch applied and
successfully tested against trunk revision r573744.

Test results:   http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/718/testReport/
Console output: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/718/console

> Remove DatanodeDescriptor dependency from NetworkTopology
> ---------------------------------------------------------
>
>                 Key: HADOOP-1266
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1266
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: dfs
>    Affects Versions: 0.14.1
>            Reporter: Konstantin Shvachko
>            Assignee: Hairong Kuang
>             Fix For: 0.15.0
>
>         Attachments: GenericTopology.patch
>
>
> NetworkTopology should operate only with the Node interface.
> The actual class DatanodeDescriptor, which implements Node should not be used inside.
> We should avoid introducing unnecessary dependencies.
> This is the typical case when everything can and should be defined using the interface.
> This becomes a requirement if we want to measure distances between other than data-nodes
> types of nodes like TaskTrackers, clients.

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