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Deploying End-to-End Deep Learning Pipelines with ONNX

Deploying End-to-End Deep Learning Pipelines with ONNX

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A deep learning model is often viewed as fully self-contained, freeing practitioners from the burden of data processing and feature engineering. However, in most real-world applications of AI, these models have similarly complex requirements for data pre-processing, feature extraction and transformation as more traditional ML models. Any non-trivial use case requires care to ensure no model skew exists between the training-time data pipeline and the inference-time data pipeline.

This is not simply theoretical – small differences or errors can be difficult to detect but can have dramatic impact on the performance and efficacy of the deployed solution. Despite this, there are currently few widely accepted, standard solutions for enabling simple deployment of end-to-end deep learning pipelines to production. Recently, the Open Neural Network Exchange (ONNX) standard has emerged for representing deep learning models in a standardized format.

While this is useful for representing the core model inference phase, we need to go further to encompass deployment of the end-to-end pipeline. In this talk I will introduce ONNX for exporting deep learning computation graphs, as well as the ONNX-ML component of the specification, for exporting both ‘traditional’ ML models as well as common feature extraction, data transformation and post-processing steps.

I will cover how to use ONNX and the growing ecosystem of exporter libraries for common frameworks (including TensorFlow, PyTorch, Keras, scikit-learn and now Apache SparkML) to deploy complete deep learning pipelines.

Finally, I will explore best practices for working with and combining these disparate exporter toolkits, as well as highlight the gaps, issues and missing pieces to be taken into account and still to be addressed.

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