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From Suneel Marthi <smar...@apache.org>
Subject Apache Mahout 0.10.0 Released
Date Sun, 12 Apr 2015 10:48:17 GMT
The Apache Mahout PMC is pleased to announce the release of Mahout 0.10.0.
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. This release has some
major changes from 0.9, including the new Apache Spark back-end (with H2O
in progress), a new matrix math DSL, streamlined content and bug fixes.

The Mahout Math environment we call “Samsara” 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 most fully on

To get started with Apache Mahout 0.10.0, download the release artifacts
and signatures from http://www.apache.org/dist/mahout/0.10.0/

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


Mahout-Samsara has implementations for these generalized concepts:


   Linear algebra operations, multiply, transpose, slice, row and column

   Distributed BLAS optimizer

   R-Like operators; for example A.t %*% A, which performs an optimized
   ‘thin’ A’A

   Packaged as extensions to Scala

   Includes a Scala REPL based interactive shell that runs on Spark

   Integrates with compatible libraries like MLLib

Mahout has historically been about highly scalable algorithms, and though
we continue to support many of the past Hadoop MapReduce implementations
(now with full Hadoop 2 support), Mahout also comes with the some new
Mahout-Samsara based implementations:


   Distributed and in-core: Stochastic Singular Value Decomposition (SSVD)

   Distributed Principal Component Analysis (PCA)

   Distributed and in-core QR Reduction (QR)

   Distributed Alternating Least Squares decomposition (ALS)

   Collaborative Filtering: Item and Row Similarity based on cooccurrence
   and supporting multimodal user actions

   Naive Bayes Classification


Since Mahout is positioned as an environment it also allows seamless use of
libraries like Mllib. If you need scalable linear algebra, think Mahout, if
you need a specific algorithm check any compatible library as well.


A total of 205 separate JIRA issues are addressed in this release [2]. with
65 bugfixes.


Download the release artifacts and signatures at
https://mahout.apache.org/general/downloads.html 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.



As the project moves towards a 0.10.1 release, we are working on the


   Implement an end-to-end pipeline for an itemsimilarity recommender
   workflow on top of H2O.

   Implement a more robust text processing pipeline

   Incorporate more statistical operations

   Support Spark DataFrames

Post 0.10.1

We already see the need for work in these areas:


   Mahout algebra performance improvements and bug fixes

   Streaming data


   Fuller H2O support

   Apache Flink support

   In-core matrix performance optimization


If you are interested in contributing, please see our How to Contribute
<http://mahout.apache.org/developers/how-to-contribute.html>[3] page or
contact us via email at dev@mahout.apache.org.


As with any release, we wish to thank all of the users and contributors to
Mahout. Please see the CHANGELOG [1] and JIRA Release Notes [2] for
individual credits, as there are too many to list here.

[1] https://github.com/apache/mahout/blob/master/CHANGELOG

[3] http://mahout.apache.org/developers/how-to-contribute.html

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