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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-257) starting one data node thread to manage multiple data directories
Date Fri, 26 May 2006 23:07:29 GMT
starting one data node thread to manage multiple data directories
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         Key: HADOOP-257
         URL: http://issues.apache.org/jira/browse/HADOOP-257
     Project: Hadoop
        Type: Improvement

  Components: dfs  
    Reporter: Hairong Kuang


If a data node is configured with multiple data directories, current implementation of dfs
will start multiple data node threads, each of which manages one data directory and talks
to its name node independently. From the name node's point of view, it sees multiple data
nodes instead of one.

I feel that a more scalable solution should be to start one data node thread that manages
multiple data diretories. But the one data node thread needs to take care of the block allocation
problem.

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