News: SystemML Release 0.8.0 - Distributed and Declarative Machine Learning

The Spark Technology Center team has just released SystemML 0.8.0.

SystemML 0.8.0 is the first binary release of SystemML since its initial migration to GitHub on August 16, 2015. This release represents 320+ patches from 14 contributors since that date. SystemML became publicly available on GitHub on August 27, 2015.

Extensive updates have been made to the project in several areas. These include APIs, data ingestion, optimizations, language and runtime operators, new algorithms, testing, and online documentation.


Improvements to MLContext and to MLPipeline wrappers

Data Ingestion

Data conversion utilities (from RDDs and DataFrames)
Data transformations on raw data sets


Extensions to compilation chain, including IPA
Improvements to parfor
Improved execution of concurrent Apache Spark jobs
New rewrites, including eager RDD caching and repartitioning
Improvements to buffer pool caching
Partitioning-preserving operations
On-demand creation of SparkContext
Efficient use of RDD checkpointing

Language and Runtime Operators

New matrix multiplication operators (e.g., ZipMM)
New multi-threaded readers and operators
Extended aggregation-outer operations for different relational operators
Sample capability

New Algorithms

Alternating Least Squares (Conjugate Gradient)
Cubic Splines (Conjugate Gradient and Direct Solve)


PyDML algorithm tests
Test suite refactoring
Improvements to performance tests

Online Documentation

Quick Start Guide
DML and PyDML Programming Guide
MLContext Programming Guide
Algorithms Reference
DML Language Reference
Debugger Guide
Documentation site available at


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