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https://issues.apache.org/jira/browse/HDFS-13326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16437968#comment-16437968
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Gang Li commented on HDFS-13326:
--------------------------------

I just uploaded [^HDFS-13326.001.patch] supporting new add and update in the 
command line based on [~ywskycn]'s comments. 

> RBF: Improve the interfaces to modify and view mount tables
> -----------------------------------------------------------
>
>                 Key: HDFS-13326
>                 URL: https://issues.apache.org/jira/browse/HDFS-13326
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Wei Yan
>            Assignee: Gang Li
>            Priority: Minor
>         Attachments: HDFS-13326.000.patch, HDFS-13326.001.patch
>
>
> 1. From DFSRouterAdmin cmd, currently the update logic is implemented inside 
> add operation, where it has some limitation (e.g. cannot update "readonly" or 
> removing a destination).  Given the RPC alreadys separate add and update 
> operations, it would be better to do the same in cmd level.
> 2. Currently in the MountTable tab, the "readonly" field always show empty, 
> no matter whether the mount entry is readonly or not. From the code 
> perspective, it tries to show:
> {code:java}
> <td class="dfshealth-node-icon dfshealth-mount-read-only-{readonly}"/>{code}
> The federationhealth.html will load hadoop.css, however the hadoop.css 
> doesn't have classes with a prefix "dfshealth-mount-read-only". This could be 
> fixed in HDFS-13204.



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