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From "Mahadev konar (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1073) Simpler model for Namenode's fs Image and edit Logs
Date Thu, 19 Aug 2010 18:53:22 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12900396#action_12900396
] 

Mahadev konar commented on HDFS-1073:
-------------------------------------

sanjay,
 I dont understand the disadvantage you are quoting here. As far as I see being able to seek
to a specific transaction quickly (which the snapshot log  with txnid enable u to do) is a
good thing! 

Is it the minimum set of code changes that is making you guys reject on the txn based snapshots
and logging? As far as I read Todd's description, using transaction ids and naming the edit
logs and image using the transaction id's enable you to all those recoveries stated in Todd's
document!

> 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: 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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