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Parallelized Training of Deep NN Comparison of Current Concepts and Frameworks Sebastian Jger, Hans-Peter Zorn, Stefan Igel, Christian Zirpins Rennes, Dec 10, 2018 Motivation Need to scale the training of neural networks horizontally


  1. Parallelized Training of Deep NN Comparison of Current Concepts and Frameworks Sebastian Jäger, Hans-Peter Zorn, Stefan Igel, Christian Zirpins Rennes, Dec 10, 2018

  2. Motivation › Need to scale the training of neural networks horizontally › Kubernetes based technology stack › Scalability of concepts and frameworks 2

  3. Distributed Training Methods Data Parallelism 3

  4. Data Parallelism Centralized Parameter Server TensorFlow: https://www.tensorflow.org 4

  5. Data Parallelism Decentralized Parameter Server Apache MXNet: http://mxnet.apache.org 5

  6. Experimental Setup Environment › Google Kubernetes Engine › CPU: 2.6 GHz › Ubuntu 16.04 › TensorFlow 1.8.0 › MXNet 1.3.0 6

  7. Experimental Setup Networks Convolutional NN Recurrent NN › LeNet-5 › LSTM › 5 layer › 2 layer › 10 classes › 200 units › Fashion MNIST › Penn Tree Bank › 28x28 gray-scale › 1.000.000 words 7

  8. Experimental Setup Metrics 8

  9. Results Convolutional Neural Network 9

  10. Results Convolutional Neural Network 10

  11. Results Recurrent Neural Network 11

  12. Summarizating the Experiments Decentralized Parameter Server ... › more robust regarding increasing communication effort › scales better for small NN For bigger/ more complex NN … › no significant difference between concepts 12

  13. Conclusion MXNet ... › for small NN better scalability and throughput › for bigger NN higher throughput › less and less complicated code › easier to scale up training 13

  14. Thank you Sebastian Jäger @se_jaeger inovex GmbH Ludwig-Erhard-Allee 6 76131 Karlsruhe sebastian.jaeger@inovex.de

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