Book Image

Seven NoSQL Databases in a Week

By : Sudarshan Kadambi, Xun (Brian) Wu
Book Image

Seven NoSQL Databases in a Week

By: Sudarshan Kadambi, Xun (Brian) Wu

Overview of this book

This is the golden age of open source NoSQL databases. With enterprises having to work with large amounts of unstructured data and moving away from expensive monolithic architecture, the adoption of NoSQL databases is rapidly increasing. Being familiar with the popular NoSQL databases and knowing how to use them is a must for budding DBAs and developers. This book introduces you to the different types of NoSQL databases and gets you started with seven of the most popular NoSQL databases used by enterprises today. We start off with a brief overview of what NoSQL databases are, followed by an explanation of why and when to use them. The book then covers the seven most popular databases in each of these categories: MongoDB, Amazon DynamoDB, Redis, HBase, Cassandra, In?uxDB, and Neo4j. The book doesn't go into too much detail about each database but teaches you enough to get started with them. By the end of this book, you will have a thorough understanding of the different NoSQL databases and their functionalities, empowering you to select and use the right database according to your needs.
Table of Contents (16 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

Using Redis


Now that we have a running server, we will cover some simple examples to explore some of Redis' basic functionality. This section will introduce tools such as redis-cli, as well as examples for interacting with Redis via Python and Java.

redis-cli

Redis comes with the redis-cli command-line tool. This is a simple, yet powerful tool that allows you to write, query, and otherwise manage the key/values stored in your Redis instance. To run redis-cli (as demonstrated in the previous section), you can invoke it from the command line. To avoid the extra step of authentication, I'll send the password along with the -a flag:

src/redis-cli -a currentHorseBatteryStaple -n 0

You can also specify the database number with the -n flag. If you do not specify it, redis-cli will connect to the database 0 (zero) by default. Additionally, you can change databases with the SELECT command:

127.0.0.1:6379> SELECT 0

To start with, let's set a simple message in database 0. We will name the key packt:welcome...