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From "Yanbo Liang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3878) Add an administrative command to download finalized edit log segments from the NN
Date Wed, 19 Sep 2012 11:51:11 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13458600#comment-13458600
] 

Yanbo Liang commented on HDFS-3878:
-----------------------------------

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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