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Posted to common-dev@hadoop.apache.org by "Milind Bhandarkar (JIRA)" <ji...@apache.org> on 2006/11/20 23:26:11 UTC

[jira] Commented: (HADOOP-332) Implement remote replication of dfs namespace images and transaction logs

    [ http://issues.apache.org/jira/browse/HADOOP-332?page=comments#action_12451455 ] 
            
Milind Bhandarkar commented on HADOOP-332:
------------------------------------------

should this issue be closed now that we have a patch committed for HADOOP-90 ?

> 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
>
> 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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