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Date: Fri, 3 Dec 2010 19:34:10 -0500 (EST)
From: "dhruba borthakur (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Updated: (HDFS-1509) Resync discarded directories in
 fs.name.dir during saveNamespace command
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     [ https://issues.apache.org/jira/browse/HDFS-1509?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

dhruba borthakur updated HDFS-1509:
-----------------------------------

    Attachment: resyncBadNameDir1.txt

Unit test doe snot pass yet, this is a draft version of the code.

> Resync discarded directories in fs.name.dir during saveNamespace command
> ------------------------------------------------------------------------
>
>                 Key: HDFS-1509
>                 URL: https://issues.apache.org/jira/browse/HDFS-1509
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>         Attachments: resyncBadNameDir1.txt
>
>
> In the current implementation, if the Namenode encounters an error while writing to a fs.name.dir directory it stops writing new edits to that directory. My proposal is to make  the namenode write the fsimage to all configured directories in fs.name.dir, and from then on, continue writing fsedits to all configured directories.

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