Release Notes for Intel® oneAPI Data Analytics Library

Published:07/01/2019   Last Updated:12/04/2020

This article includes the Release Notes for Intel® oneAPI Data Analytics Library (oneDAL)

Version History

Document revision Date Change History
2021.1 2020-12-07 2021.1 Release Update


oneDAL is the library of Intel® architecture optimized building blocks covering all stages of compute-intense data analytics: data acquisition from a data source, preprocessing, transformation, data mining, modeling, validation, and decision making.

System Requirements

Please see dedicate system requirements article.


The release introduces the following changes: 

The release contains all functionality of Intel® DAAL. See Intel® DAAL release notes for more details. 

Library Engineering

  • Renamed the library from Intel® Data Analytics Acceleration Library to oneAPI Data Analytics Library and changed the package names to reflect this. 
  • Deprecated 32-bit version of the library. 
  • Introduced Intel GPU support for both OpenCL and Level Zero backends. 
  • Introduced Unified Shared Memory (USM) support 

What's New

  • Introduced new Intel® DAAL and daal4py functionality:
    • GPU:
      • Batch algorithms: K-means, Covariance, PCA, Logistic Regression, Linear Regression, Random Forest Classification and Regression, Gradient Boosting Classification and Regression, kNN, SVM, DBSCAN and Low-order moments 
      • Online algorithms: Covariance, PCA, Linear Regression and Low-order moments 
      • Added Data Management functionality to support DPC++ APIs: a new table type for representation of SYCL-based numeric tables (SyclNumericTable) and an optimized CSV data source 
  • Improved oneDAL and daal4py performance for the following algorithms: 
    • CPU: 
      • Logistic Regression training and prediction 
      • k-Nearest Neighbors prediction with Brute Force method 
      • Logistic Loss and Cross Entropy objective functions
  • Added Technical Preview Features in Graph Analytics:
    • CPU:

      • Undirected graph without edge and vertex weights (undirected_adjacency_array_graph), where vertex indices can only be of type int32 
      • Jaccard Similarity Coefficients for all pairs of vertices, a batch algorithm that processes the graph by blocks 


  • Aligned the library with oneDAL Specification 1.0 for the following algorithms: 
    • CPU/GPU: 
      • K-means, PCA, Random Forest Classification and Regression, kNN and SVM 
  • Introduced new functionality for scikit-learn patching through daal4py: 
    • CPU: 
      • Acceleration of NearestNeighbors and KNeighborsRegressor scikit-learn estimators with Brute Force and K-D tree methods 
      • Acceleration of TSNE scikit-learn estimator 
    • GPU:
      • Intel GPU support in scikit-learn for DBSCAN, K-means, Linear and Logistic Regression 

  • Improved performance of the following scikit-learn estimators via scikit-learn patching:

    • CPU:

      • LogisticRegression fit, predict and predict_proba methods 
      • KNeighborsClassifier predict, predict_proba and kneighbors methods with “brute” method 

Known Issues

  • oneDAL DPC++ APIs does not work on GEN12 graphics with OpenCL backend. Use Level Zero backend for such cases. 
  • train_test_split in daal4py patches for Scikit-Learn* can produce incorrect shuffling on Windows* 
  • The following daal4py examples do not work on Intel® Iris Xe MAX with float64 compute mode:
    • gradient_boosted_regression_batch
    • decision_forest_classification_batch
    • decision_forest_regression_batch
    • bf_knn_classification_batch
    • dbscan_batch
    • svm_batch
    • kmeans_batch

           Run daal4py examples using float32 compute mode instead:

  1. Use np.float32 data type for input data. To do this, add parameter t=np.float32 to the readcsv function used in the examples.
  2. Set the parameter fptype to float in the algorithm object constructor: fptype='float'.
  3. Switch on float64 software emulation on Intel® Iris Xe MAX
  • K-Means example in daal4py (examples/sycl/ produces different results on GPU and CPU. To avoid failures, comment assert statements that compare GPU results and classic results in the example.
  • DBSCAN example in daal4py (examples/sycl/ hangs when it is running on CPU with data wrapped in sycl_buffer. To avoid hangs, do not pass sycl_buffer objects to DBSCAN on CPU.



Getting Started Guide

Please refer to oneDAL Getting Started Guide


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Product and Performance Information


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