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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3695) Genericize format() and initializeSharedEdits() to non-file JournalManagers
Date Thu, 09 Aug 2012 15:36:19 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3695?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13431906#comment-13431906
] 

Aaron T. Myers commented on HDFS-3695:
--------------------------------------

+1, the latest patch looks good to me.

My only suggestion is that perhaps FormatConfirmable should be a top-level interface, instead
of being declare inside the Storage class? Just a thought.
                
> Genericize format() and initializeSharedEdits() to non-file JournalManagers
> ---------------------------------------------------------------------------
>
>                 Key: HDFS-3695
>                 URL: https://issues.apache.org/jira/browse/HDFS-3695
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, name-node
>    Affects Versions: QuorumJournalManager (HDFS-3077)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-3695.txt, hdfs-3695.txt, hdfs-3695.txt
>
>
> Currently, the "namenode -format" and "namenode -initializeSharedEdits" commands do not
understand how to do anything with non-file-based shared storage. This affects both BookKeeperJournalManager
and QuorumJournalManager.
> This JIRA is to plumb through the formatting of edits directories using pluggable journal
manager implementations so that no separate step needs to be taken to format them -- the same
commands will work for NFS-based storage or one of the alternate implementations.

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