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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1073) Simpler model for Namenode's fs Image and edit Logs
Date Fri, 05 Nov 2010 19:50:50 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928794#action_12928794
] 

Robert Chansler commented on HDFS-1073:
---------------------------------------

bq. Worked so far.
 How would you know? I just feel better having some check that the log is complete, especially
in the new world where the log is a sequence of files. It's conceivable that not only could
 the last log file be truncated, any number of log _files_ at the end of the log could be
missing entirely. Of course, if the log files were being written to a more robust file system
like HDFS, the need for integrity checks would be less.

> Simpler model for Namenode's fs Image and edit Logs 
> ----------------------------------------------------
>
>                 Key: HDFS-1073
>                 URL: https://issues.apache.org/jira/browse/HDFS-1073
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Sanjay Radia
>            Assignee: Todd Lipcon
>         Attachments: hdfs-1073.txt, hdfs1073.pdf
>
>
> The naming and handling of  NN's fsImage and edit logs can be significantly improved
resulting simpler and more robust code.

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