Book Image

Real-Time Big Data Analytics

By : Sumit Gupta, Shilpi Saxena
Book Image

Real-Time Big Data Analytics

By: Sumit Gupta, Shilpi Saxena

Overview of this book

Enterprise has been striving hard to deal with the challenges of data arriving in real time or near real time. Although there are technologies such as Storm and Spark (and many more) that solve the challenges of real-time data, using the appropriate technology/framework for the right business use case is the key to success. This book provides you with the skills required to quickly design, implement and deploy your real-time analytics using real-world examples of big data use cases. From the beginning of the book, we will cover the basics of varied real-time data processing frameworks and technologies. We will discuss and explain the differences between batch and real-time processing in detail, and will also explore the techniques and programming concepts using Apache Storm. Moving on, we’ll familiarize you with “Amazon Kinesis” for real-time data processing on cloud. We will further develop your understanding of real-time analytics through a comprehensive review of Apache Spark along with the high-level architecture and the building blocks of a Spark program. You will learn how to transform your data, get an output from transformations, and persist your results using Spark RDDs, using an interface called Spark SQL to work with Spark. At the end of this book, we will introduce Spark Streaming, the streaming library of Spark, and will walk you through the emerging Lambda Architecture (LA), which provides a hybrid platform for big data processing by combining real-time and precomputed batch data to provide a near real-time view of incoming data.
Table of Contents (17 chapters)
Real-Time Big Data Analytics
About the Authors
About the Reviewer

Understanding Spark transformations and actions

In this section, we will discuss and talk about various transformation and action operations provided by Spark RDD APIs. We will also discuss about the different forms of RDD APIs.

RDD or Resilient Distributed Dataset is the core component of Spark. All operations for performing transformations on the raw data are provided in the different RDD APIs. We discussed RDD APIs and its features in the Resilient distributed datasets (RDD) section in Chapter 6, Getting Acquainted with Spark, but it is important to mention again that there is no API for accessing the raw dataset. The data in Spark can only be accessed by various operations exposed by the RDD APIs. RDDs are immutable datasets, so any transformation applied on the raw dataset, generates a new RDD without any modifications to the datasets/RDD on which transformation operations are invoked. Transformations in RDD are lazy, which means invocation of any transformation is not applied immediately...