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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1266) Remove DatanodeDescriptor dependency from NetworkTopology
Date Tue, 17 Apr 2007 23:13:15 GMT
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
         Assigned To: Hairong Kuang
             Fix For: 0.13.0

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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