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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2223) Untangle depencencies between NN components
Date Wed, 07 Sep 2011 23:24:09 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2223?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HDFS-2223:
------------------------------

       Resolution: Fixed
    Fix Version/s: 0.24.0
     Hadoop Flags: [Reviewed]
           Status: Resolved  (was: Patch Available)

Committed to trunk for now. We may want to merge this to 0.23 and/or HA soon as well, but
will hold off on that for the time being. Thanks for reviewing, Suresh.

> Untangle depencencies between NN components
> -------------------------------------------
>
>                 Key: HDFS-2223
>                 URL: https://issues.apache.org/jira/browse/HDFS-2223
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.24.0
>
>         Attachments: hdfs-2223-1.txt, hdfs-2223-10.txt, hdfs-2223-2.txt, hdfs-2223-3.txt,
hdfs-2223-4.txt, hdfs-2223-5.txt, hdfs-2223-6.txt, hdfs-2223-7.txt, hdfs-2223-8.txt, hdfs-2223-9.txt
>
>
> Working in the NN a lot for HA (HDFS-1623) I've come across a number of situations where
the tangled dependencies between NN components has been problematic for adding new features
and for testability. It would be good to untangle some of these and clarify what the distinction
is between the different components: NameNode, FSNamesystem, FSDirectory, FSImage, NNStorage,
and FSEditLog

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