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From "Sameer Paranjpye (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-257) starting one data node thread to manage multiple data directories
Date Wed, 31 May 2006 00:35:31 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-257?page=all ]

Sameer Paranjpye updated HADOOP-257:
------------------------------------

    Fix Version: 0.4
        Version: 0.2
      Assign To: Konstantin Shvachko

> starting one data node thread to manage multiple data directories
> -----------------------------------------------------------------
>
>          Key: HADOOP-257
>          URL: http://issues.apache.org/jira/browse/HADOOP-257
>      Project: Hadoop
>         Type: Improvement

>   Components: dfs
>     Versions: 0.2
>     Reporter: Hairong Kuang
>     Assignee: Konstantin Shvachko
>      Fix For: 0.4

>
> 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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