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  #About RHadoop is a collection of four R packages that allow users to manage and analyze data with Hadoop. The packages are regularly tested (and always before a release) on recent releases of the Cloudera and Hortonworks Hadoop distributions and should have broad compatibility with open source Hadoop and mapR's distribution. We normally test on recent Revolution R and CentOS releases, but we expect all the RHadoop packages to work on a recent release of open source R and Linux.

For more detailed information concerning rmr see [Compatibility] https://github.com/RevolutionAnalytics/rmr2/blob/master/docs/compatibility.md).

RHadoop consists of the following packages:

• NEW! plyrmr - higher level plyr-like data processing for structured data, powered by rmr
• rmr - functions providing Hadoop MapReduce functionality in R
• rhdfs - functions providing file management of the HDFS from within R
• rhbase - functions providing database management for the HBase distributed database from within R

More information about RHadoop

• Having problems? Post a message on the RHadoop Google Group
• Overview of RHadoop, from the Revolution Analytics blog.
• Slides and Replay of 30-minute presentation about RHadoop, "Leveraging R in Hadoop Environments".
• R in a Nutshell, 2nd edition devotes a good part of the last chapter to RHadoop. "The most mature (and best integrated) project for R and Hadoop is RHadoop."
• For developers

Questions: Please participate in our discussion group.

News

• 5/19/2014 plyrmr 0.3.0 released with partial ungroup, extension packs and improved quantile.cols and count.cols, plus a raft of bug fixes. See the Changelog.
• 5/19/2014 rmr 3.1.1 released, a bugfix release. See the Changelog.
• 3/31/2014 plyrmr 0.2.0 released with a simplified API and lots of new features. See the Changelog.
• 3/27/2014 rmr 3.1.0 released. More flexible tmp dir selection, hbase input filters and many bugs squashed. See the Changelog
• 2/10/2014 rmr 3.0.0 released. Faster, do I need to say more? See the Changelog
• 11/11/2013 rhdfs 1.0.8 released. Compatibility with Hadoop 3.0.0.
• 10/14/2013 rhdfs 1.0.7 released. Update for HDP 1.3 Windows
• 10/9/2013 plyrmr 0.1.0 is available.
• 10/7/2013 rmr 2.3.0 is available. See the Changelog.
• 9/27/2013 A preview for plyrmr is available.
• 6/18/2013 rmr 2.2.2 released, two bug fixes, one very important, upgrade recommended. See the Changelog.
• 6/21/2013 rhbase 1.2.0 released, adds character serialization, fixes raw.
• 6/21/2013 rhdfs 1.0.6 released, adds windows compatibility.
• 6/20/2013 rmr 2.2.1 released, adds windows compatbility, some speed improvements and bug fixes. See the Changelog.
• 4/18/2013 rmr 2.2.0 released, with flexible I/O formats for equijoins, configurable HDFS tempdir, a more convenient rmr.str for debugging, better error messages and many bugfixes. See the Changelog.
• 3/7/2013 rhbase 1.1.1 released, fixes an issue with CR/LF breaking the build on some platforms
• 2/25/2013 rmr 2.1.0 released, improves speed, adds in-memory combiners and more vectorization, status and counters, hbase input and more. See the Changelog.
• 2/5/2013 Created package-specific repos to better support development. See the announcement.
• 12/4/2012 rmr 2.0.2 released with ligther dependencies and multiple bug fixes. See the Changelog.
• 10/29/2012 rmr 2.0.1 released with multiple bug fixes and tested against most major Hadoop distros. See the Changelog.
• 10/18/2012 rhbase (1.1) added 'filterstring' support for scan operations on HBase tables (HBase 0.92 or >)
• 10/1/2012 rmr 2.0 released, simplest and fastest rmr yet, makes everything vectorized and gives first class status to structured data. See the Changelog
• 9/10/2012 branched rmr-2.0 to prepare for the next release. Also provided a tgz file for download. Many changes and documentation still mostly out of date. Try it if you are able to read the source code. Feedback is welcome.
• 7/30/2012 rmr 1.3.1 tested on major Hadoop distros and Rmd docs — See the Changelog.
• 7/17/2012 rhdfs (1.0.4) change to handle different classpaths in the init function
• 7/13/2012 rmr 1.3 with vectorized API — See the Changelog.
• 5/18/2012 rhdfs (1.0.3) bug fix in function hdfs.file
• 4/14/2012 rhbase (1.0.4) and rhdfs (1.0.2) minor bug fixes and some cleanup for R CMD check
• 3/30/2012 rmr 1.2.2 fixes from.dfs for some obscure platforms and prepares for apache 1.0.2 compatibility (more flexible w.r.t. hadoop layout)
• 3/13/2012 New version of rhbase (1.0.3) that supports both "native" and "raw" serialization
• 2/27/2012 rmr version 1.2 with binary formats and other goodies available — See the Changelog.
• 2/11/2012 New version of rhbase (1.0.2) that installs with thrift 0.8 or greater.
• 2/1/2012 Binary format now default in dev, passes all normal checks. Please test.
• 24/1/2012 - Merged branch binary-io into dev.Please note some non-backward compatible changes in the API intended to strike a compromise between flexibility and ease of use in the IO department.
• 12/7/2011 - Version 1.1 of the package rmr is available. See the Changelog for details.
• 9/29/2011 - Version 1.0.1 available - fixes some minor defects with R CMD check tests on the packages