Redis: A Beginner's Guide (3rd Edition)

Redis: A Beginner's Guide (3rd Edition) is an introductory Redis text revised from the first two editions, covering Redis 6.0 throughout, in nine chapters plus three appendices. It begins with Redis's history and development, explaining its storage structure—key-value data held in memory with the option of persistence to disk—and its characteristics in functionality, stability, and ease of adoption, answering the question beginners ask most often: why use Redis at all? It then covers installation on POSIX systems, macOS, and Windows, along with starting and stopping Redis, configuration, multiple databases, and use of the command-line client. The core chapters unfold type by type—strings, hashes, lists, sets, sorted sets, and streams—each following the same progression: what it is, which commands it has, what scenarios it serves, and which lesser-known commands remain. The advanced section discusses transactions and WATCH, expiration and rate limiting, SORT, task queues and publish/subscribe, pipelining, and space optimization at the level of key names and internal encodings. The practice chapter takes a task-driven approach, using dialogues between the fictional characters "Xiaobai" and "Teacher Song" to demonstrate installing and calling client libraries for PHP, Ruby, Python, and Node.js, and to complete small projects such as user registration and login, autocomplete, and online friends. The final two chapters cover Lua scripting, persistence, Sentinel, and Cluster—high availability and operations topics—while the appendices provide a quick reference to command attributes, an index of configuration parameters, and a reference implementation of CRC16.