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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-101) DFSck - fsck-like utility for checking DFS volumes
Date Thu, 23 Mar 2006 19:42:19 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-101?page=comments#action_12371625 ] 

Konstantin Shvachko commented on HADOOP-101:
--------------------------------------------

Looks like a good utility for collecting meta-data statistics.

It does not detect missing blocks, though.
The missing block problem is when the namenode "thinks" a block
is stored on one or several datanodes, while it is not.
In order to detect this the utility needs to actually read blocks from
each of the specified locations. Is there an API call for that?
And it does not have an option to convert the system into a consistent state,
which is usually provided by fscks.

It would be very useful to integrate this code with the DFSShell.report(),
providing more reporting options for the system.

> DFSck - fsck-like utility for checking DFS volumes
> --------------------------------------------------
>
>          Key: HADOOP-101
>          URL: http://issues.apache.org/jira/browse/HADOOP-101
>      Project: Hadoop
>         Type: New Feature
>   Components: dfs
>     Versions: 0.2
>     Reporter: Andrzej Bialecki 
>     Assignee: Andrzej Bialecki 
>  Attachments: DFSck.java
>
> This is a utility to check health status of a DFS volume, and collect some additional
statistics.

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