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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5595) NameNode does not need to run a replicator to choose a random DataNode
Date Mon, 30 Mar 2009 22:37:50 GMT
NameNode does not need to run a replicator to choose a random DataNode
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                 Key: HADOOP-5595
                 URL: https://issues.apache.org/jira/browse/HADOOP-5595
             Project: Hadoop Core
          Issue Type: Improvement
          Components: dfs
            Reporter: Hairong Kuang
            Assignee: Hairong Kuang
             Fix For: 0.21.0
         Attachments: randomDataNode.patch

FSNamesystem#getRandomDatanode uses a replicator to choose a random DataNode. It's an overkill.
Instead, Topology#chooseRandom is a much light-weight way to choose a random DataNode from
a cluster map.

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