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From "Nigel Daley (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-828) Need a tool to analyse and verify file block movements
Date Fri, 15 Dec 2006 01:17:22 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-828?page=all ]

Nigel Daley updated HADOOP-828:
-------------------------------

    Attachment: Block-Movement-Analysis-Tool-Design.html

First draft of a tool design.

> Need a tool to analyse and verify file block movements
> ------------------------------------------------------
>
>                 Key: HADOOP-828
>                 URL: http://issues.apache.org/jira/browse/HADOOP-828
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: util
>    Affects Versions: 0.9.1
>            Reporter: Nigel Daley
>         Attachments: Block-Movement-Analysis-Tool-Design.html
>
>
> Occasionally a file is corrupted because a block goes missing. This may occur if all
the Datanodes containing a given block shutdown or crash, or from defects in the Datanode
or Namenode code-base.  A simple diagnostic tool is needed that can trace and analyze the
historical movement of the blocks in a given file.

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