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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HADOOP-332) Implement remote replication of dfs namespace images and transaction logs
Date Thu, 03 Aug 2006 03:37:17 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-332?page=all ]

Owen O'Malley reassigned HADOOP-332:
------------------------------------

    Assignee: Konstantin Shvachko  (was: Owen O'Malley)

> Implement remote replication of dfs namespace images and transaction logs
> -------------------------------------------------------------------------
>
>                 Key: HADOOP-332
>                 URL: http://issues.apache.org/jira/browse/HADOOP-332
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: dfs
>    Affects Versions: 0.4.0
>            Reporter: Owen O'Malley
>         Assigned To: Konstantin Shvachko
>             Fix For: 0.5.0
>
>
> The namespace information (image and transaction logs) needs to be replicated on hosts
other than the namenode to prevent data loss if a namenode crashes. In the short term we will
add a new protocol to the datanodes to receive and store the namespace information.
> In the long term, it would be nice to have read-only namenodes that could receive the
information and serve it up for users that want to read data, but do not need to write to
the namespace.

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