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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1509) Resync discarded directories in fs.name.dir during saveNamespace command
Date Fri, 19 Nov 2010 00:59:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12933642#action_12933642
] 

dhruba borthakur commented on HDFS-1509:
----------------------------------------

> dir gets black-listed will get re-instated on the first checkpoint after it becomes valid.

This process works ok. This is just another manual way of triggering this sooner (rather than
waiting for the next checkpoint)

> 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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