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From "Akira AJISAKA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8110) Remove unsupported operation , -rollingUpgrade downgrade related information from document
Date Fri, 24 Apr 2015 11:28:38 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14510831#comment-14510831
] 

Akira AJISAKA commented on HDFS-8110:
-------------------------------------

Looks good to me, +1. Committing this.

> Remove unsupported operation , -rollingUpgrade downgrade related information from document
> ------------------------------------------------------------------------------------------
>
>                 Key: HDFS-8110
>                 URL: https://issues.apache.org/jira/browse/HDFS-8110
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: documentation
>            Reporter: J.Andreina
>            Assignee: J.Andreina
>            Priority: Minor
>         Attachments: HDFS-8110.1.patch
>
>
> Support for "-rollingUpgrade downgrade" is been removed as part of HDFS-7302.
> Corresponding information should be removed from document also.
> {noformat}
> Downgrade with Downtime
> Administrator may choose to first shutdown the cluster and then downgrade it. The following
are the steps:
> Shutdown all NNs and DNs.
> Restore the pre-upgrade release in all machines.
> Start NNs with the "-rollingUpgrade downgrade" option.
> Start DNs normally.
> {noformat}



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