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From Ravi Prakash <ravihad...@gmail.com>
Subject Re: HDFS Federation
Date Mon, 06 Jun 2016 20:44:25 GMT
Perhaps use the "viewfs://" protocol prepended to your path?


On Sun, Jun 5, 2016 at 1:10 PM, Kun Ren <ren.hdfs@gmail.com> wrote:

> 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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