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https://issues.apache.org/jira/browse/HDFS-2223?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron T. Myers updated HDFS-2223:
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Status: Patch Available (was: Open)
> 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
> Attachments: hdfs-2223-1.txt, hdfs-2223-2.txt, hdfs-2223-3.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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