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From Kun Ren <ren.h...@gmail.com>
Subject HDFS Federation
Date Sun, 05 Jun 2016 20:10:04 GMT
Hi Genius,

I just configured HDFS Federation, and try to use it(2 namenodes, one is
for /my, another is for /your). When I  run the command:
hdfs dfs -ls /,

I can get:
-r-xr-xr-x   - hadoop hadoop          0 2016-06-05 20:05 /my
-r-xr-xr-x   - hadoop hadoop          0 2016-06-05 20:05 /your

This makes sense. However, when I run the command to create a new directory:
hdfs dfs -mkdir /my/test

I got error:
mkdir: `/my/test': No such file or directory.

Even when I run "hdfs dfs -ls /my", still get the no such file or directory
error.

Does someone tell me how to use the command line to do the file operations
with HDFS Federation? Thanks a lot for your help.

I attached My core-site.xml and hdfs-site.xml:

Core-site.xml:

<configuration>

       <property>

               <name>fs.defaultFS</name>

               <value>viewfs:///</value>

       </property>

       <property>

               <name>fs.viewfs.mounttable.default.link./my</name>

               <value>hdfs://Master:9000/my</value>

       </property>

       <property>

               <name>fs.viewfs.mounttable.default.link./your</name>

               <value>hdfs://Slave1:9000/your</value>

       </property>

       <property>

               <name>hadoop.tmp.dir</name>

               <value>file:/home/hadoop/hadoop_build/tmp</value>

       </property>
</configuration>



Hdfs-site.xml:

<configuration>

    <property>

       <name>dfs.replication</name>

       <value>1</value>

    </property>

    <property>

       <name>dfs.namenode.name.dir</name>

       <value>file:/home/hadoop/hadoop_build/tmp/dfs/name</value>

    </property>

    <property>

       <name>dfs.datanode.data.dir</name>

       <value>file:/home/hadoop/hadoop_build/tmp/dfs/data</value>

    </property>

       <property>

               <name>dfs.federation.nameservices</name>

               <value>mycluster,yourcluster</value>

       </property>

       <property>

               <name>dfs.namenode.rpc-address.mycluster</name>

               <value>Master:9000</value>

       </property>

       <property>

               <name>dfs.namenode.rpc-address.yourcluster</name>

               <value>Slave1:9000</value>

       </property>

       <property>

               <name>dfs.namenode.http-address.mycluster</name>

               <value>Master:50070</value>

       </property>

       <property>

               <name>dfs.namenode.http-address.yourcluster</name>

               <value>Slave1:50070</value>

       </property>

</configuration>

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