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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5585) Provide admin commands for data node upgrade
Date Fri, 21 Feb 2014 20:53:22 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13908798#comment-13908798
] 

Tsz Wo (Nicholas), SZE commented on HDFS-5585:
----------------------------------------------

Hi Kihwal, I am working on documentation.  Could you describe the usage of the new commands?

> Provide admin commands for data node upgrade
> --------------------------------------------
>
>                 Key: HDFS-5585
>                 URL: https://issues.apache.org/jira/browse/HDFS-5585
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, ha, hdfs-client, namenode
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>             Fix For: HDFS-5535 (Rolling upgrades)
>
>         Attachments: HDFS-5585.patch, HDFS-5585.patch, HDFS-5585.patch
>
>
> Several new methods to ClientDatanodeProtocol may need to be added to support querying
version, initiating upgrade, etc.  The admin CLI needs to be added as well. This primary use
case is for rolling upgrade, but this can be used for preparing for a graceful restart of
a data node for any reasons.



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