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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1509) Resync discarded directories in fs.name.dir during saveNamespace command
Date Fri, 19 Nov 2010 02:48:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12933654#action_12933654
] 

Eli Collins commented on HDFS-1509:
-----------------------------------

Isn't there a motivation for the Namenode no longer writing new edits to a directory when
it encounters an error while writing to a fs.name.dir directory? eg that constantly try writing
to a failed directory slows things down. 

> 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
>
> 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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