BUILDING A MINIMALIST DATABASE IN 3000 LINES OF CODE

Summary from the TLDR Web Dev newsletter

This article goes over how to build a simple database in about 3,000 lines of Go. By building it incrementally, it teaches core database principles like power-loss atomicity through append-only logs, efficient indexing with copy-on-write B+trees, and storage management with free lists. The DB starts as a simple KV store and evolves step-by-step to a relational database with transactions, concurrency control, and a SQL-like query language.