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https://issues.apache.org/jira/browse/HDFS-1071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12851469#action_12851469
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Allen Wittenauer commented on HDFS-1071:
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I'm looking forward to this fix, because it will make having a quorum for image
files that much easier.
> savenamespace should write the fsimage to all configured fs.name.dir in
> parallel
> --------------------------------------------------------------------------------
>
> Key: HDFS-1071
> URL: https://issues.apache.org/jira/browse/HDFS-1071
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Reporter: dhruba borthakur
> Assignee: Dmytro Molkov
>
> If you have a large number of files in HDFS, the fsimage file is very big.
> When the namenode restarts, it writes a copy of the fsimage to all
> directories configured in fs.name.dir. This takes a long time, especially if
> there are many directories in fs.name.dir. Make the NN write the fsimage to
> all these directories in parallel.
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