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Date: Fri, 1 Sep 2006 16:22:27 -0700 (PDT)
From: "Milind Bhandarkar (JIRA)" <jira@apache.org>
To: hadoop-dev@lucene.apache.org
Subject: [jira] Updated: (HADOOP-64) DataNode should be capable of managing
 multiple volumes
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     [ http://issues.apache.org/jira/browse/HADOOP-64?page=all ]

Milind Bhandarkar updated HADOOP-64:
------------------------------------

    Status: Patch Available  (was: Open)

Patch attached.

> DataNode should be capable of managing multiple volumes
> -------------------------------------------------------
>
>                 Key: HADOOP-64
>                 URL: http://issues.apache.org/jira/browse/HADOOP-64
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: dfs
>    Affects Versions: 0.2.0
>            Reporter: Sameer Paranjpye
>         Assigned To: Milind Bhandarkar
>            Priority: Minor
>             Fix For: 0.6.0
>
>         Attachments: multiple-volumes.patch
>
>
> 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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