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Posted to common-dev@hadoop.apache.org by "Zhe Zhang (JIRA)" <ji...@apache.org> on 2016/04/22 19:52:12 UTC

[jira] [Created] (HADOOP-13055) Implement linkMergeSlash for ViewFs

Zhe Zhang created HADOOP-13055:
----------------------------------

             Summary: Implement linkMergeSlash for ViewFs
                 Key: HADOOP-13055
                 URL: https://issues.apache.org/jira/browse/HADOOP-13055
             Project: Hadoop Common
          Issue Type: New Feature
          Components: fs, viewfs
            Reporter: Zhe Zhang
            Assignee: Zhe Zhang


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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