Book Image

Mastering Hadoop 3

By : Chanchal Singh, Manish Kumar
Book Image

Mastering Hadoop 3

By: Chanchal Singh, Manish Kumar

Overview of this book

Apache Hadoop is one of the most popular big data solutions for distributed storage and for processing large chunks of data. With Hadoop 3, Apache promises to provide a high-performance, more fault-tolerant, and highly efficient big data processing platform, with a focus on improved scalability and increased efficiency. With this guide, you’ll understand advanced concepts of the Hadoop ecosystem tool. You’ll learn how Hadoop works internally, study advanced concepts of different ecosystem tools, discover solutions to real-world use cases, and understand how to secure your cluster. It will then walk you through HDFS, YARN, MapReduce, and Hadoop 3 concepts. You’ll be able to address common challenges like using Kafka efficiently, designing low latency, reliable message delivery Kafka systems, and handling high data volumes. As you advance, you’ll discover how to address major challenges when building an enterprise-grade messaging system, and how to use different stream processing systems along with Kafka to fulfil your enterprise goals. By the end of this book, you’ll have a complete understanding of how components in the Hadoop ecosystem are effectively integrated to implement a fast and reliable data pipeline, and you’ll be equipped to tackle a range of real-world problems in data pipelines.
Table of Contents (23 chapters)
Title Page
Dedication
About Packt
Foreword
Contributors
Preface
Index

Common machine learning challenges


The following are some of the common challenges that you will face while running your machine learning application:

  • Data quality: Data from sources is, most of the time, not suitable for machine learning. It has to be cleaned or checked for data quality first. Data has to be in the format that is suitable for the machine learning processes that you want to run. One such example would be removing nulls. The popular machine learning algorithm Random Forest does not support nulls.
  • Data scaling: Sometimes, your data is comprised of attributes that vary in magnitude or scale. So, to prevent machine learning algorithms from being unbiased to re-scaling, under-scaled or over-scaled, attributes of the same scale is helpful. This helps machine learning optimization algorithms like gradient descent a great deal. Algorithms that iteratively weigh inputs, like regression and neural networks, or algorithms that are based on distance measures, like k-nearest neighbors...