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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-56) hadoop nameserver does not recognise ndfs nameserver image
Date Mon, 27 Feb 2006 18:43:28 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-56?page=comments#action_12368007 ] 

Doug Cutting commented on HADOOP-56:
------------------------------------

I agree with Eric: a filesystem GUID could be a useful long-term feature, and may help solve
this problem, but we need a simpler solution short-term.  I think adding a format command
would address this issue, and also still be useful if we later add a filesystem guid.

> hadoop nameserver does not recognise ndfs nameserver image
> ----------------------------------------------------------
>
>          Key: HADOOP-56
>          URL: http://issues.apache.org/jira/browse/HADOOP-56
>      Project: Hadoop
>         Type: Bug
>   Components: dfs
>     Versions: 0.1
>     Reporter: Yoram Arnon
>     Priority: Critical
>  Attachments: ndfs.tar.gz
>
> hadoop nameserver does not recognise ndfs image
> Thus, upgrading from ndfs to hadoop dfs results in total data loss.
> The upgrade should be seemless, with the new server recognising all previous version
that are not end-of-life'd.

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