mahout施用

mahout使用

转自：http://hi.baidu.com/pakko/blog/item/3516fd6e34032bce80cb4afb.html

运行kmeans的简单的例子：

1：将样本数据集放到hdfs中指定文件下,应该在testdata文件夹下
$HADOOP_HOME/bin/hadoop fs -put <PATH TO DATA> testdata
例如：
bin/hadoop fs? ?-put /home/hadoopuser/mahout-0.3/test/synthetic_control.data??/user/hadoopuser/testdata/

2：使用kmeans算法
$HADOOP_HOME/bin/hadoop jar $MAHOUT_HOME/examples/target/mahout-examples-$MAHOUT_VERSION.job org.apache.mahout.clustering.syntheticcontrol.kmeans.Job
例如：
bin/hadoop jar /home/hadoopuser/mahout-0.3/mahout-examples-0.1.job org.apache.mahout.clustering.syntheticcontrol.kmeans.Job

3：使用canopy算法
$HADOOP_HOME/bin/hadoop jar $MAHOUT_HOME/examples/target/mahout-examples-$MAHOUT_VERSION.job org.apache.mahout.clustering.syntheticcontrol.canopy.Job
例如：
bin/hadoop jar /home/hadoopuser/mahout-0.3/mahout-examples-0.1.job org.apache.mahout.clustering.syntheticcontrol.canopy.Job

4：使用dirichlet 算法
$HADOOP_HOME/bin/hadoop jar $MAHOUT_HOME/examples/target/mahout-examples-$MAHOUT_VERSION.job org.apache.mahout.clustering.syntheticcontrol.dirichlet.Job

5：使用meanshift算法
meanshift : $HADOOP_HOME/bin/hadoop jar $MAHOUT_HOME/examples/target/mahout-examples-$MAHOUT_VERSION.job org.apache.mahout.clustering.syntheticcontrol.meanshift.Job

6：查看一下结果吧
bin/mahout vectordump --seqFile /user/hadoopuser/output/data/part-00000
这个直接把结果显示在控制台上。

Get the data out of HDFS??and have a look?
All example jobs use testdata as input and output to directory output
Use bin/hadoop fs -lsr output to view all outputs
Output:
KMeans is placed into output/points
Canopy and MeanShift results are placed into output/clustered-points

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