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From "John Zhuge (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14259) Verify viewfs works with ADLS
Date Tue, 04 Apr 2017 08:00:51 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15954758#comment-15954758
] 

John Zhuge commented on HADOOP-14259:
-------------------------------------

HADOOP-14258 documents client root-mount table implemented inside ADLS connector while viewfs
is more generic.  See the [doc|https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/ViewFs.html].

{code:xml}
<configuration>
  <property>
    <name>fs.defaultFS</name>
    <value>viewfs://clusterX</value>
  </property>
  <property>
    <name>fs.viewfs.mounttable.ClusterX.homedir</name>
    <value>/home</value>
  </property>
  <property>
    <name>fs.viewfs.mounttable.ClusterX.link./home</name>
    <value>hdfs://nn1-clusterx.example.com:9820/home</value>
  </property>
  <property>
    <name>fs.viewfs.mounttable.ClusterX.link./tmp</name>
    <value>hdfs://nn1-clusterx.example.com:9820/tmp</value>
  </property>
  <property>
    <name>fs.viewfs.mounttable.ClusterX.link./projects/foo</name>
    <value>hdfs://nn2-clusterx.example.com:9820/projects/foo</value>
  </property>
  <property>
    <name>fs.viewfs.mounttable.ClusterX.link./projects/bar</name>
    <value>hdfs://nn3-clusterx.example.com:9820/projects/bar</value>
  </property>
</configuration>
{code}

> Verify viewfs works with ADLS
> -----------------------------
>
>                 Key: HADOOP-14259
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14259
>             Project: Hadoop Common
>          Issue Type: Test
>          Components: fs/adl, viewfs
>    Affects Versions: 2.8.0
>            Reporter: John Zhuge
>            Priority: Minor
>
> Many clusters can share a single ADL store as the default filesystem. In order to prevent
directories of the same names but from different clusters to collide, use viewfs over ADLS
filesystem: 
> * Set {{fs.defaultFS}} to {{viewfs://clusterX}} for cluster X
> * Set {{fs.defaultFS}} to {{viewfs://clusterY}} for cluster Y
> * The viewfs client mount table should have entry clusterX and ClusterY
> Tasks
> * Verify all filesystem operations work as expected, especially rename and concat
> * Verify homedir entry works



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