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https://issues.apache.org/jira/browse/HADOOP-13055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16169536#comment-16169536
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Chris Douglas commented on HADOOP-13055:
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I haven't looked at the patch in detail, but I noticed that this doesn't
include an update to the documentation. Would you mind updating the ViewFS docs
with the new configuration properties? Examples and best practices would surely
be useful, also.
> 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
>
>
> 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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