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ℹ️ New Book: Build Your Own Database

01. Introduction

What Is This Book About?

This book contains a step-by-step walkthrough of a simple implementation of a Redis-like server. It is intended as a practical guide or tutorial to network programming and the implementation and application of basic data structures in C.

What to Learn From This Book?

Redis could be considered one of the building blocks of modern computing that stood the test of time. The knowledge required for building such a project is broader and deeper than usual application-level development. Learning from such projects is a good way for software developers to level up their skills.

Redis is a good target for learning because it covers two important subjects of software engineering: network programming and data structures.

Like most real-world projects, Redis is a complex project built with lots of effort, which can be hard to grasp for beginners. Instead, this book takes an opposite approach: learning by building things from scratch.

Why From Scratch?

A couple of points:

Summarized in a quote from Feynman: “What I cannot create, I do not understand”.

How to Use This Book?

This book follows a step-by-step approach. Each step builds on the previous one, adding a new concept. The full source code is provided on the web for reference purposes, readers are advised to tinker with it or DIY without it.

The code is written as direct and straightforwardly as the author could. It’s mostly plain C with minimal C++ features. Don’t worry if you don’t know C, you just have the opportunity to do it in another language by yourself.

The end result is a mini Redis alike with only about 1200 lines of code. 1200 LoC seems low, but it illustrates many important aspects the book attempts to cover.

The techniques and approaches used in the book are not exactly the same as the real Redis. Some are intentionally simplified, and some are chosen to illustrate a general topic. Readers can learn even more by comparing different approaches.

The code used in this book is intended to run on Linux only, and can be downloaded at this URL:

https://build-your-own.org/redis/src.tgz

The contents and the source code of this book can be browsed online at:

https://build-your-own.org

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