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Scala for Machine Learning, Second Edition

You're reading from   Scala for Machine Learning, Second Edition Build systems for data processing, machine learning, and deep learning

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Product type Paperback
Published in Sep 2017
Publisher Packt
ISBN-13 9781787122383
Length 740 pages
Edition 2nd Edition
Languages
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Author (1):
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Patrick R. Nicolas Patrick R. Nicolas
Author Profile Icon Patrick R. Nicolas
Patrick R. Nicolas
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Table of Contents (21) Chapters Close

Preface 1. Getting Started FREE CHAPTER 2. Data Pipelines 3. Data Preprocessing 4. Unsupervised Learning 5. Dimension Reduction 6. Naïve Bayes Classifiers 7. Sequential Data Models 8. Monte Carlo Inference 9. Regression and Regularization 10. Multilayer Perceptron 11. Deep Learning 12. Kernel Models and SVM 13. Evolutionary Computing 14. Multiarmed Bandits 15. Reinforcement Learning 16. Parallelism in Scala and Akka 17. Apache Spark MLlib A. Basic Concepts B. References Index

Performance evaluation

There are numerous configuration parameters that can be set to optimize the execution of Spark jobs. The topic of tuning and the resolution of performance bottlenecks on Spark clusters deserves at the minimum, a dedicated chapter.

This section does not address Mesos-and Yarn-specific configurations as they are not related to machine learning and are beyond the scope of this book [7:11].

Tuning parameters

The performance of a Spark application depends greatly on the configuration parameters. Selecting the appropriate value for those configuration parameters in Spark can be overwhelming—there are more than 60 configuration parameters as of the last count. Fortunately, the majority of those parameters have relevant default values.

However, there are a few parameters that deserve your attention, including:

  • Number of cores available to execute transformation and actions on RDDs: config.cores.max.
  • Memory available for the execution of the transformation and actions spark...
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