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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1073) Simpler model for Namenode's fs Image and edit Logs
Date Sat, 23 Oct 2010 06:03:24 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924135#action_12924135
] 

Todd Lipcon commented on HDFS-1073:
-----------------------------------

Hi Rob. You raise a good point. I think we'd have to do something where shutting down the
NN with 100-inprogress would result in 100-100, and the NN would reopen that file as 100-inprogress
upon restart. This seems messy to me - I would love to keep an invariant that once a file
is "finalized" it is never renamed or changes contents.

> 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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