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From Suneel Marthi <smar...@apache.org>
Subject [ANNOUNCE] Apache Mahout 0.11.1 Release
Date Sat, 07 Nov 2015 02:05:46 GMT
The Apache Mahout PMC is pleased to announce the release of Mahout 0.11.1.

Mahout's goal is to create an environment for quickly creating machine
learning applications that scale and run on the highest performance
parallel computation engines available. Mahout comprises an interactive
environment and library that supports generalized scalable linear algebra
and includes many modern machine learning algorithms.

The Mahout Math environment we call “Samsara (संसारा )” for its symbol of
universal renewal. It reflects a fundamental rethinking of how scalable
machine learning algorithms are built and customized. Mahout-Samsara is
here to help people create their own math while providing some
off-the-shelf algorithm implementations. At its base are general linear
algebra and statistical operations along with the data structures to
support them. It’s written in Scala with Mahout-specific extensions, and
runs on Spark and H2O.

To get started with Apache Mahout 0.11.1, download the release artifacts
and signatures from http://www.apache.org/dist/mahout/0.11.1/.

Many thanks to the contributors and committers who were part of this
release. Please see below for the Release Highlights.


This is a minor release over Mahout 0.11.0 meant to expand Mahout’s
compatibility with Spark versions, to introduce some new features and to
fix some bugs.  Mahout 0.11.1 includes all new features and bug fixes
released in Mahout versions 0.11.0 and earlier.

Mahout 0.11.1 new features compared to Mahout 0.11.0


   Spark 1.4+ support.

   4x Performance improvement in Dot Product over Dense Vectors (

   %*% optimization based on matrix flavors.

Note: Mahout 0.11.1 artifacts are binary compatible with Spark 1.4x and
Spark 1.5+.


A total of 34 separate JIRA issues are addressed in this release [2] with
10 bugfixes.


Download the release artifacts and signatures at
http://www.apache.org/dist/mahout/0.11.1/ The examples directory contains
several working examples of the core functionality available in Mahout.
These can be run via scripts in the examples/bin directory. Most examples
do not need a Hadoop cluster in order to run.


Integration with Apache Flink is in the works and is targeted for Mahout
Release 0.12.0 in collaboration with TU Berlin and Data Artisans to add
Flink as the 3rd execution engine to Mahout. This would be in addition to
existing Apache Spark and H2O engines.

To see progress on this branch look here:



   In the binary zip or tar distribution, the example data for
   mahout/examples/bin/run-item-sim is missing. To run it get the csv files
   from Github

   OOM errors are observed on Mac OS with Java 7 when running trying to run
   the Mahout Spark Shell, it works fine with Java 8.


[2] http://mahout.apache.org/developers/how-to-contribute.html
[3] https://github.com/apache/mahout/tree/master/examples/src/main/resource

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