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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3190) Simple refactors in existing NN code to assist QuorumJournalManager extension
Date Mon, 13 Aug 2012 20:54:38 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HDFS-3190:
------------------------------

    Fix Version/s: 2.2.0-alpha

Backported this to branch-2, since it was causing some conflicts in other backports, and it's
a straight refactor.
                
> Simple refactors in existing NN code to assist QuorumJournalManager extension
> -----------------------------------------------------------------------------
>
>                 Key: HDFS-3190
>                 URL: https://issues.apache.org/jira/browse/HDFS-3190
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>    Affects Versions: 2.0.0-alpha
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
>             Fix For: 3.0.0, 2.2.0-alpha
>
>         Attachments: hdfs-3190.txt, hdfs-3190.txt, hdfs-3190.txt, hdfs-3190.txt, hdfs-3190.txt
>
>
> This JIRA is for some simple refactors in the NN:
> - refactor the code which writes the seen_txid file in NNStorage into a new "LongContainingFile"
utility class. This is useful for the JournalNode to atomically/durably record its last promised
epoch
> - refactor the interface from FileJournalManager back to StorageDirectory to use a StorageErrorReport
interface. This allows FileJournalManager to be used in isolation of a full StorageDirectory.

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