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From "Reid Chan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11242) Add refresh cluster network topology operation to dfs admin
Date Wed, 14 Dec 2016 08:37:58 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11242?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Reid Chan updated HDFS-11242:
-----------------------------
    Attachment: HDFS-11242.002.patch

Fix style problems, and add the server side proto implementation.

Reviews and suggestions about codes are welcomed, thanks~

> Add refresh cluster network topology operation to dfs admin
> -----------------------------------------------------------
>
>                 Key: HDFS-11242
>                 URL: https://issues.apache.org/jira/browse/HDFS-11242
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Reid Chan
>            Priority: Minor
>         Attachments: HDFS-11242.002.patch, HDFS-11242.patch
>
>
> The network topology and dns to switch mapping are initialized at the start of the namenode.
> If admin wants to change the topology because of new datanodes added, he has to stop
and restart namenode(s), otherwise those new added datanodes are squeezed under /default-rack.
> It is a low frequency operation, but it should be operated appropriately, so dfs admin
should take the responsibility.



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