Build Your Own Database From Scratch

Introduction

Databases are not black boxes. Understand them by building your own from scratch!

This book contains a walk-through of a minimal persistent database implementation. The implementation is incremental. We start with a B-Tree, then add a new concept with each chapter, and eventually go from a simple KV to a mini relational DB.

Although the book is short and the implementation is minimal, it aims to cover three important topics:

1. Persistence. How not to lose or corrupt your data. Recovering from a crash.
2. Indexing. Efficiently querying and manipulating your data. (B-tree).
3. Concurrency. How to handle multiple (large number of) clients. And transactions.

Contents

Part I: Simple KV Store (Completed)

0. Introduction
1. Files vs Databases
2. Indexing
3. B-Tree: The Ideas
4. B-Tree: The Practice (Part I)
5. B-Tree: The Practice (Part II)
6. Persist to Disk
7. Free List: Reusing Pages

Part II: Mini Relational DB (Work in Progress)

8. Rows and Columns
9. Range Query
10. Secondary Index
11. Transactions
12. Concurrent Readers and Writers
13. Query Language

Work in Progress…

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