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From "Yongjun Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HADOOP-13055) Implement linkMergeSlash and linkFallback for ViewFileSystem
Date Wed, 09 May 2018 05:59:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16468410#comment-16468410
] 

Yongjun Zhang edited comment on HADOOP-13055 at 5/9/18 5:58 AM:
----------------------------------------------------------------

Talked with [~xiaochen], we agreed to revert it from 3.0.3 (branch-3.0) since it's a new feature.
I just did the revert. Thanks.

 


was (Author: yzhangal):
Talked with [~xiaochen], we agreed to revert it from 3.0.3 since it's a new feature. Thanks.

 

> Implement linkMergeSlash and linkFallback for ViewFileSystem
> ------------------------------------------------------------
>
>                 Key: HADOOP-13055
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13055
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs, viewfs
>    Affects Versions: 2.7.5
>            Reporter: Zhe Zhang
>            Assignee: Manoj Govindassamy
>            Priority: Major
>             Fix For: 3.1.0
>
>         Attachments: HADOOP-13055.00.patch, HADOOP-13055.01.patch, HADOOP-13055.02.patch,
HADOOP-13055.03.patch, HADOOP-13055.04.patch, HADOOP-13055.05.patch, HADOOP-13055.06.patch,
HADOOP-13055.07.patch, HADOOP-13055.08.patch, HADOOP-13055.09.patch
>
>
> In a multi-cluster environment it is sometimes useful to operate on the root / slash
directory of an HDFS cluster. E.g., list all top level directories. Quoting the comment in
{{ViewFs}}:
> {code}
>  *   A special case of the merge mount is where mount table's root is merged
>  *   with the root (slash) of another file system:
>  *   <ul>
>  *   <li>    fs.viewfs.mounttable.default.linkMergeSlash=hdfs://nn99/
>  *   </ul>
>  *   In this cases the root of the mount table is merged with the root of
>  *            <b>hdfs://nn99/ </b> 
> {code}



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