Book Image

Mastering Redis

By : Jeremy Nelson
Book Image

Mastering Redis

By: Jeremy Nelson

Overview of this book

Redis is the most popular, open-source, key value data structure server that provides a wide range of capabilities on which multiple platforms can be be built. Its fast and flexible data structures give your existing applications an edge in the development environment. This book is a practical guide which aims to help you deep dive into the world of Redis data structure to exploit its excellent features. We start our journey by understanding the need of Redis in brief, followed by an explanation of Advanced key management. Next, you will learn about design patterns, best practices for using Redis in DevOps environment and Docker containerization paradigm in detail. After this, you will understand the concept of scaling with Redis cluster and Redis Sentinel , followed by a through explanation of incorporating Redis with NoSQL technologies such as Elasticsearch and MongoDB. At the end of this section, you will be able to develop competent applications using these technologies. You will then explore the message queuing and task management features of Redis and will be able to implement them in your applications. Finally, you will learn how Redis can be used to build real-time data analytic dashboards, for different disparate data streams.
Table of Contents (18 chapters)
Mastering Redis
About the Author
About the Reviewers

Hardware and network latencies

In your application, performance issues can easily be mistaken for out-of-memory issues with your Redis database when the problem may have to do more with hardware or network latencies between your client application and your backend server. Latency, as understood in the Redis community, is broken down in three ways:

  • Command latency: This is the amount of time it takes to execute a command. Some commands are fast and operate in O(1) while other commands have O(n) time complexity and are thereby a likely source of this type of latency.

  • Round-trip latency: The time between when a client issues a command and then receives the response from the Redis server that can be caused by network congestion.

  • Client-latency: If multiple clients attempt to connect to Redis at the same time, concurrency latency can be introduced as later clients may be waiting in queue for early client processes to complete.

To help debug issues, Redis has a special mode for monitoring command...