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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9005) Provide configuration support for upgrade domain
Date Tue, 29 Mar 2016 10:05:25 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15215787#comment-15215787
] 

Steve Loughran commented on HDFS-9005:
--------------------------------------

I hadn't seen it. And yes, I'd have kept it back until the rat fix went in. Easily done.

> Provide configuration support for upgrade domain
> ------------------------------------------------
>
>                 Key: HDFS-9005
>                 URL: https://issues.apache.org/jira/browse/HDFS-9005
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Ming Ma
>            Assignee: Ming Ma
>             Fix For: 3.0.0, 2.8.0
>
>         Attachments: HDFS-9005-2.patch, HDFS-9005-3.patch, HDFS-9005-4.patch, HDFS-9005.patch
>
>
> As part of the upgrade domain feature, we need to provide a mechanism to specify upgrade
domain for each datanode. One way to accomplish that is to allow admins specify an upgrade
domain script that takes DN ip or hostname as input and return the upgrade domain. Then namenode
will use it at run time to set {{DatanodeInfo}}'s upgrade domain string. The configuration
can be something like:
> {noformat}
> <property>
> <name>dfs.namenode.upgrade.domain.script.file.name</name>
> <value>/etc/hadoop/conf/upgrade-domain.sh</value>
> </property>
> {noformat}
> just like topology script, 



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