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Databricks Runtime for Machine Learning

  • Άρθρο

Databricks Runtime for Machine Learning (Databricks Runtime ML) automates the creation of a cluster with pre-built machine learning and deep learning infrastructure including the most common ML and DL libraries. For the full list of libraries in each version of Databricks Runtime ML, see the release notes.

Note

To access data in Unity Catalog for machine learning workflows, the access mode for the cluster must be single user (assigned). Shared clusters are not compatible with Databricks Runtime for Machine Learning. In addition, Databricks Runtime ML is not supported on TableACLs clusters or clusters with spark.databricks.pyspark.enableProcessIsolation config set to true.

Create a cluster using Databricks Runtime ML

When you create a cluster, select a Databricks Runtime ML version from the Databricks runtime version drop-down menu. Both CPU and GPU-enabled ML runtimes are available.

Select Databricks Runtime ML

If you select a cluster from the drop-down menu in the notebook, the Databricks Runtime version appears at the right of the cluster name:

View Databricks Runtime ML version

If you select a GPU-enabled ML runtime, you are prompted to select a compatible Driver type and Worker type. Incompatible instance types are grayed out in the drop-down menu. GPU-enabled instance types are listed under the GPU accelerated label. For information about creating Azure Databricks GPU clusters, see GPU-enabled compute. Databricks Runtime ML includes GPU hardware drivers and NVIDIA libraries such as CUDA.

Photon and Databricks Runtime ML

When you create a CPU cluster running Databricks Runtime 15.2 ML or above, you can choose to enable Photon. Photon improves performance for applications using Spark SQL, Spark DataFrames, feature engineering, GraphFrames, and xgboost4j. It is not expected to improve performance on applications using Spark RDDs, Pandas UDFs, and non-JVM languages such as Python. Thus, Python packages such as XGBoost, PyTorch, and TensorFlow will not see an improvement with Photon.

Spark RDD APIs and Spark MLlib have limited compatibility with Photon. When processing large datasets using Spark RDD or Spark MLlib, you may experience Spark memory issues. See Spark memory issues.

Libraries included in Databricks Runtime ML

Databricks Runtime ML includes a variety of popular ML libraries. The libraries are updated with each release to include new features and fixes.

Databricks has designated a subset of the supported libraries as top-tier libraries. For these libraries, Databricks provides a faster update cadence, updating to the latest package releases with each runtime release (barring dependency conflicts). Databricks also provides advanced support, testing, and embedded optimizations for top-tier libraries.

For a full list of top-tier and other provided libraries, see the release notes for Databricks Runtime ML.

You can install additional libraries to create a custom environment for your notebook or cluster.