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https://issues.apache.org/jira/browse/HDFS-3878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13458600#comment-13458600
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Yanbo Liang commented on HDFS-3878:
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Then we can have the completement persistent metadata of a specific HDFS.
And a script can combine fetchImage and fetchEdit command to back up the NN
on-disk metadata.
Any opinions pls feel free to let me know.
> Add an administrative command to download finalized edit log segments from
> the NN
> ---------------------------------------------------------------------------------
>
> Key: HDFS-3878
> URL: https://issues.apache.org/jira/browse/HDFS-3878
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: hdfs client, name-node
> Affects Versions: 2.0.0-alpha
> Reporter: Aaron T. Myers
> Labels: patch
> Attachments: HDFS-3878.patch
>
>
> Similarly to the `hdfs dfsadmin -fetchImage' command added in HDFS-2941, it
> would be nice to have an admin command capable of fetching edit log segments.
> This could be useful, for example, for use in a script designed to back up
> the NN on-disk metadata.
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