INSTALL

1. Install Hadoop
	1-1. Single Node (http://hadoop.apache.org/common/docs/r0.20.203.0/single_node_setup.html)
	1-2. Cluster Node (http://hadoop.apache.org/common/docs/r0.20.203.0/cluster_setup.html)
	1-3. set HADOOP_HOME at local machine on which R runs
	
2. Install Hive
	2-1. install local machine and remote machine on which NameNode runs or Hive-Server runs.
	2-2. Installation Guide 
	     (https://cwiki.apache.org/confluence/display/Hive/GettingStarted#GettingStarted-InstallationandConfiguration)
	2-3. set HIVE_HOME at local machine on which R runs.
	2-4. launch Hive Server with following command on remote machine.
		 e.q. >$HIVE_HOME/bin/hive --service hiveserver.
		
3. Install R and Packages
	3-1. install R
		3-1-1. need to install R on all tasktracker nodes
	3-2. install rJava
		3-2-1. only install rJava on local machine.
	3-3. install Rserve
		3-3-1. need to install Rserve on all tasktracker nodes
		3-3-2. set RHIVE_DATA as R objects and R functions repository on all tasktracker nodes.
			   e.q. >export RHIVE_DATA=/rhive/data
	    3-3-3. make configuration in path (/etc/Rserv.conf) on all tasktracker nodes.
	           edit this file to add 'remote enable' to allow remote connection.
	    3-3-4. launch all Rserve on all tasktracker nodes.
	    	   e.q. >R CMD Rserve
	3-4. install RUnit
	
4. Install RHive
	4-1. Download source code
		4-1-1. git clone https://github.com/nexr/RHive.git
	4-2. Change your working directory
		4-2-1. cd RHive 
	4-3. Set the environment variables HIVE_HOME and HADOOP_HOME
		4-3-1. export HIVE_HOME=/path/to/your/hive/directory
		4-3-2. export HADOOP_HOME=/path/to/your/hadoop/directory
	4-4. Build java files using ant
		4-4-1. ant build
	4-5. Build RHive
		4-5-1. R CMD build RHive
	4-6. Install RHive
		4-6-1. R CMD INSTALL RHive_<VERSION>.tar.gz

5. Launch RHive
	5-1. launch R
	5-2. >library(RHive)