Book Image

Data Lake for Enterprises

By : Vivek Mishra, Tomcy John, Pankaj Misra
Book Image

Data Lake for Enterprises

By: Vivek Mishra, Tomcy John, Pankaj Misra

Overview of this book

The term "Data Lake" has recently emerged as a prominent term in the big data industry. Data scientists can make use of it in deriving meaningful insights that can be used by businesses to redefine or transform the way they operate. Lambda architecture is also emerging as one of the very eminent patterns in the big data landscape, as it not only helps to derive useful information from historical data but also correlates real-time data to enable business to take critical decisions. This book tries to bring these two important aspects — data lake and lambda architecture—together. This book is divided into three main sections. The first introduces you to the concept of data lakes, the importance of data lakes in enterprises, and getting you up-to-speed with the Lambda architecture. The second section delves into the principal components of building a data lake using the Lambda architecture. It introduces you to popular big data technologies such as Apache Hadoop, Spark, Sqoop, Flume, and ElasticSearch. The third section is a highly practical demonstration of putting it all together, and shows you how an enterprise data lake can be implemented, along with several real-world use-cases. It also shows you how other peripheral components can be added to the lake to make it more efficient. By the end of this book, you will be able to choose the right big data technologies using the lambda architectural patterns to build your enterprise data lake.
Table of Contents (23 chapters)
Title Page
Credits
Foreword
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
Part 1 - Overview
Part 2 - Technical Building blocks of Data Lake
Part 3 - Bringing It All Together

Clients for Elasticsearch


Using the Java programming language the following are the ways by which Elasticsearch can be communicated.

  • Transport Client: Used by REST clients internally. Full support from Elasticsearch as these are used by Elasticsearch internally to achieve various tasks. The most efficient methodology for communication and is quite fast. It uses a binary protocol for communication, the same protocol Elasticsearch uses internally. The following code shows how can you acquire the transport client to communicate with the Elasticsearch. More details on this can be found in elastic's official blog here https://goo.gl/0ZKZIk:
TransportAddress address = new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9200);
Settings settings = Settings.builder().put("cluster.name", "dataLakeCluster").build();
Client client = new PreBuiltTransportClient(settings).addTransportAddress(address);
  • Java REST Client: Communicates with Elasticsearch using HTTP. Compatible with most Elasticsearch...