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CHANGELOG.md

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CHANGELOG

Version 0.7.1-SNAPSHOT - Build 20160320

  • Removing Apache Commons Lang from the dependencies. Adding a faster custom unescapeHtml method in HTMLParser.

Version 0.7.0 - Build 20160319

  • Speed & Memory:
    • Added multi-threading support on the majority of algorithms and methods, making the 0.7.0 version several times faster than 0.6.x.
    • Implemented Storage Hints & hybrid strategies which enable the efficient use of LRU cache and faster training for large datasets that don't fit in memory.
    • All the algorithms which require Matrixes now use sparse implementations to reduce the memory footprint.
    • Fixed a limitation on clustering algorithms which forced us to store the list of clusters in memory.
  • Algorithms & Methods:
    • Added L1, L2 and ElasticNet regularization in Logistic, Ordinal and Linear Regression algorithms.
    • The Collaborative Filtering algorithm was modified to support more generic User-user CF models.
    • Updated the NgramsExtractor algorithm to export more keywords and provide better signals for NLP models.
  • Framework Architecture:
    • The framework is now split to separate modules and the main library is renamed to "datumbox-framework-lib".
    • The Dataset class is replaced with the Dataframe class, which implements the Collection interface and enables the processing of the records in parallel.
    • Major changes on the structure of Interfaces and inheritance to simplify the architecture.
    • BaseMLrecommender now inherits from BaseMLmodel.
  • Code Improvements & Bug Fixes:
    • Added serialVersionUID in every serializable class.
    • Improved Exceptions and error messages.
    • Fixed a bug on Adaboost which resulted in mapping incorrectly the recordIds.
    • Improved documentation and javadocs comments.
    • Increased the test-coverage.

Version 0.6.1 - Build 20160102

  • Fixed a minor issue related to Unreleased Resources on tests.
  • Resolved a memory leak on the AutoCloseConnector class. The shutdown hooks are now removed when close() is called.
  • Updated the TypeInference class to reduce memory consumption.
  • Refactored the TextClassifier class and improved its speed.
  • Updated all dependencies and maven plugins to the latest stable versions.

Version 0.6.0 - Build 20150502

  • Added support of MapDB database engine.
  • Removed MongoDB support due to performance issues.
  • Reduced the level of abstraction and simplify framework's architecture.
  • Rewrote the persistence mechanisms, remove unnecessary data structures and features that increased the complexity.
  • Changed the public methods of the Machine Learning models to resemble Python's Scikit-Learn APIs.
  • Added convenience methods to build a dataset from CSV or text files.
  • Enhanced the documentation and Javadoc comments of the Framework.
  • Changed the software License from "GNU General Public License v3.0" to "Apache License, Version 2.0".

Version 0.5.1 - Build 20141105

  • Updated the pom.xml file.
  • Submitted the Datumbox Framework and the LPSolve library in Maven Central Repository.
  • Resolved issues #1, #2 and #4. All the dependencies are now on Maven.

Version 0.5.0 - Build 20141018

  • First open-source version of Datumbox Framework.