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

Redis internals

As a network server, Redis's internal operations follow a basic execution flow where the server waits and listens for incoming connections on a port by accepting the connection if the inbound client communicates with the correct syntax and format called the REdis Serialization Protocol (RESP). After accepting the socket connection, Redis yields a descriptor for nonblocking read and write operations on the in-memory state of the database.

Redis Server Execution Flow

For the Redis server, the main function creates an event loop calling the aeMain function that creates an infinite while loop. This loop tests the event loop's stop property and exits if the test fails. Each iteration of the while loop in aeMain calls the aeProcessEvents function with a pointer to the event loop along with any flags. The aeProcessEvents function processes all the time-based events before processing all the file events. Remember that POSIX systems treat running processes as file descriptors, so even...