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https://issues.apache.org/jira/browse/HADOOP-1266?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hairong Kuang updated HADOOP-1266:
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Attachment: GenericTopology.patch
This patch removes the NetworkTopology's dependency on DatanodeDescriptor.
> Remove DatanodeDescriptor dependency from NetworkTopology
> ---------------------------------------------------------
>
> Key: HADOOP-1266
> URL: https://issues.apache.org/jira/browse/HADOOP-1266
> Project: Hadoop
> Issue Type: Improvement
> Components: dfs
> Reporter: Konstantin Shvachko
> Assignee: Hairong Kuang
> 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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