如何使用Mahout？

Question

我曾尝试使用以下链接使用mahout：http://girlincomputerscience.blogspot.in/2010/11/apache-mahout.html

当我执行以下命令时

anand@ubuntu:~/Downloads/mahout-distribution-0.9$ bin/mahout recommenditembased --input mydata.dat --usersFile user.dat --numRecommendations 2 --output output/ --similarityClassname SIMILARITY_PEARSON_CORRELATION

它显示：

hadoop binary is not in PATH,HADOOP_HOME/bin,HADOOP_PREFIX/bin, running locally Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine.

这些错误可能的原因是什么？

Answer 1

您需要首先设置Apache Hadoop (还描述了here )：

$ http://mirror.metrocast.net/apache/hadoop/common/hadoop-1.2.1/hadoop-1.2.1-bin.tar.gz
$ tar zxf hadoop-1.2.1-bin.tar.gz
$ cd hadoop-1.2.1
$ export PATH=`pwd`/bin:$PATH

然后尝试设置Apache Mahout

Apache Mahout设置

$ wget -c http://archive.apache.org/dist/mahout/0.9/mahout-distribution-0.9.tar.gz
$ tar zxf mahout-distribution-0.9.tar.gz
$ cd mahout-distribution-0.9

设置环境变量：

export HADOOP_HOME=/path/to/hadoop-1.2.1
export PATH=$HADOOP_HOME/bin:$PATH
export MAHOUT_HOME=/path/to/mahout-distribution-0.9
export PATH=$MAHOUT_HOME/bin:$PATH

现在，您的Mahout安装应该可以正常工作了(有关更多信息，请阅读here )。