#Muthupandian

Here are the steps to install Apache Mahout 1. Download latest package from http://mirror.nexcess.net/apache/mahout/ 2. Extract the package 3. Create a directory and put into HDFS <hadoop_directory> hdfs dfs -put /home/Hadoop/data/mydata.txt /mahout_data/ 4. Run clustering in mahout <mahout_directory>/bin/mahout seqdirectory -i hdfs://localhost:9000/mahout_data/ -o hdfs://localhost:9000/clustered_data/ 5. The output file will be in clustered_data directory

Java class Properties file

Error: Exception in thread "main" java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: ${system:java.io.tmpdir%7D/$%7Bsystem:user.name%7D at org.apache.hadoop.fs.Path.initialize(Path.java:205) Solution: Edit and update hive-site.xml <name>hive.exec.scratchdir</name> <value>/tmp/hive-${user.name}</value> <name>hive.exec.local.scratchdir</name> <value>/tmp/${user.name}</value> <name>hive.downloaded.resources.dir</name> <value>/tmp/${user.name}_resources</value>

#1. Compile this code and run in hadoop like #2. Put the "transaction.csv" into HDFS hadoop jar Cat.jar org.myorg.Cat #3. You will get the output in the console itself

Error: java . lang . RuntimeException : java . lang . ClassNotFoundException : org . gamma . WordCount$Map To solve this Add: job .setJarByClass(WordCount. class ); in main()

To verify hadoop's all node are running properly, type $jps The output should be like

$cd ~ $open -a TextEdit.app .bash_profile This will open a text editor there you can edit your environment variable Ex: export JAVA_HOME=/etc/java/java_path Save the file $source .bash_profile