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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5585) Provide admin commands for data node upgrade
Date Wed, 12 Feb 2014 06:31:25 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13898855#comment-13898855
] 

Suresh Srinivas commented on HDFS-5585:
---------------------------------------

For folks who do not look deeply into the patch, [~kihwal], can you please add brief description
of the changes in the patch?

> 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
>         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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