Build a Database in 3000 Lines of Go: From Zero Dependencies to SQL Queries
2025-01-19
This article details the creation of a small database in 3000 lines of Go code, starting from zero dependencies. The author walks through the core concepts, beginning with power-loss atomicity (achieved through append-only logs and checksums) and efficient indexing using data structures like B+trees. The process is explained step-by-step, covering append-only KV store creation, space reclamation, relational database operations (point/range queries, secondary indexes), concurrency control, and a simple SQL-like query language. The entire process is documented in a book, freely available online.
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