Book Image

Mastering Apache Cassandra

By : Nishant Neeraj
Book Image

Mastering Apache Cassandra

By: Nishant Neeraj

Overview of this book

<p>Apache Cassandra is the perfect choice for building fault tolerant and scalable databases. Implementing Cassandra will enable you to take advantage of its features which include replication of data across multiple datacenters with lower latency rates. This book details these features that will guide you towards mastering the art of building high performing databases without compromising on performance.</p> <p>Mastering Apache Cassandra aims to give enough knowledge to enable you to program pragmatically and help you understand the limitations of Cassandra. You will also learn how to deploy a production setup and monitor it, understand what happens under the hood, and how to optimize and integrate it with other software.</p> <p>Mastering Apache Cassandra begins with a discussion on understanding Cassandra’s philosophy and design decisions while helping you understand how you can implement it to resolve business issues and run complex applications simultaneously.</p> <p>You will also get to know about how various components of Cassandra work with each other to give a robust distributed system. The different mechanisms that it provides to solve old problems in new ways are not as twisted as they seem; Cassandra is all about simplicity. Learn how to set up a cluster that can face a tornado of data reads and writes without wincing.</p> <p>If you are a beginner, you can use the examples to help you play around with Cassandra and test the water. If you are at an intermediate level, you may prefer to use this guide to help you dive into the architecture. To a DevOp, this book will help you manage and optimize your infrastructure. To a CTO, this book will help you unleash the power of Cassandra and discover the resources that it requires.</p>
Table of Contents (17 chapters)
Mastering Apache Cassandra
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
Index

Cassandra and Hadoop in action


So, with more than enough (rather boring) theory, we are ready to get some excitement. In this section, we will do a word count of a book. It will be more interesting than the grep example.

In this example we load Lewis Carroll's novel Alice in Wonderland (http://en.wikipedia.org/wiki/Alice%27s_Adventures_in_Wonderland) in Cassandra. To prepare this data, we read the text file line by line and store 500 lines in one row. The row names are formatted as row_1, row_2, and so on and the columns in each row have names such as col_1, col_2, and so on. Each row has at most 500 columns and each column has one line from the file.

To avoid noises, we have removed punctuations from the lines during the load. We could certainly do the noise reduction in the MapReduce code, but we wanted to keep it simple. What follows is the code and its explanation. It is suggested to download the code either from the author's GitHub account or from the publisher's website. Keep it handy...