HDFS client side mount table in hadoop2
Earlier blog entry detailed how to setup HDFS federation. Let's assume the two NameNodes have been setup successfully on namenode1 and namenode2.
Lets map
Run the following commands
/NN1Home to hdfs://namenode1:9001/home
and/NN2Home to hdfs://namenode2:9001/home
Add the following to the core-site.xml<?xml version="1.0"?>
<configuration>
<property>
<name>hadoop.tmp.dir</name>
<value>/home/praveensripati/Installations/hadoop-0.23.0/tmp</value>
</property>
<property>
<name>fs.default.name</name>
<value>viewfs:///</value>
</property>
<property>
<name>fs.viewfs.mounttable.default.link./NN1Home</name>
<value>hdfs://namenode1:9001/home</value>
</property>
<property>
<name>fs.viewfs.mounttable.default.link./NN2Home</name>
<value>hdfs://namenode2:9001/home</value>
</property>
</configuration>
Start the cluster with the `sbin/start-dfs.sh` command from the Hadoop Home and make sure the NameNodes and the DataNodes are working properly.Run the following commands
bin/hadoop fs -put somefile.txt /NN1Home/input
Make sure that somefile.txt is in the hdfs://namenode1:9001/home/input folder from NameNode web console.bin/hadoop fs -put somefile.txt /NN2Home/output
Make sure that somefile.txt is in the hdfs://namenode2:9001/home/output folder from NameNode web console.
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