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From "Sameer Paranjpye (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-64) DataNode should be capable of managing multiple volumes
Date Mon, 06 Mar 2006 23:06:02 GMT
DataNode should be capable of managing multiple volumes
-------------------------------------------------------

         Key: HADOOP-64
         URL: http://issues.apache.org/jira/browse/HADOOP-64
     Project: Hadoop
        Type: Improvement
  Components: dfs  
    Versions: 0.2    
    Reporter: Sameer Paranjpye
    Priority: Minor
     Fix For: 0.2


The dfs Datanode can only store data on a single filesystem volume. When a node runs its disks
JBOD this means running a Datanode per disk on the machine. While the scheme works reasonably
well on small clusters, on larger installations (several 100 nodes) it implies a very large
number of Datanodes with associated management overhead in the Namenode.

The Datanod should be enhanced to be able to handle multiple volumes on a single machine.

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