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rmr2

This package enable writing R programs for the Hadoop Mapreduce system, that is parallel distributed programs for the most popular big data platform.

Requirements

  • A Hadoop custer running any recent Hadoop distribution (CDH3 and higher, Apache Hadoop 2.2.0 and higher, HDP2 and higher)
  • R installed on each node of the cluster (3.0 or higher)

Installation

rmr2 itself needs to be installed on each node with the following expression:

install.packages("rmr2", repos = c("http://archive.rzilla.org", unlist(options("repos"))))

Configuration

rmr2 needs two env variables to be set (only on the master node): HADOOP_CMD and HADOOP_STREAMING. HADOOP_CMD should contain the main hadoop command whereas HADOOP_JAR should be set to the streaming jar, named something like hadoop-streaming*.jar, where the exact naming depends on version and distribution. Optionally, HDFS_CMD can be set to help rmr locate the hdfs command executable, which at this time only spares a few warnings, but may be mandatory in the future.

Version

The current version is 3.3.1 .