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From "Andrzej Bialecki (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-101) DFSck - fsck-like utility for checking DFS volumes
Date Thu, 23 Mar 2006 19:50:20 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-101?page=comments#action_12371628 ] 

Andrzej Bialecki  commented on HADOOP-101:
------------------------------------------

It does detect missing blocks, that's the whole point. However, you need to restart the namenode
first to be sure you get the latest block reports from datanodes.

Current failure modes for DFS involve blocks that are completely missing. The only way to
"fix" them would be to recover chains of blocks and put them into lost+found - and here we
could do better than fsck, because we know the file name they belong to.

> 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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