[ https://issues.apache.org/jira/browse/HADOOP-13055?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Wang updated HADOOP-13055:
---------------------------------
    Fix Version/s:     (was: 3.0.0)
                   3.1.0

> 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
>             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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