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From "Manoj Govindassamy (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-13055) Implement linkMergeSlash for ViewFileSystem
Date Wed, 20 Sep 2017 00:06:00 GMT

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

Manoj Govindassamy updated HADOOP-13055:
----------------------------------------
    Attachment: HADOOP-13055.07.patch

Thanks for the review [~chris.douglas]. 
Attached v07 patch with ViewFs.md updated with newer mount table configurations, samples and
recommendations. [~xkrogen], [~eddyxu], [~chris.douglas], can you please review?

> Implement linkMergeSlash 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
>         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
>
>
> 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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