minidist-rs

Simple distributed SQL query engine over a column store written in Rust.

Data lives in a simple columnar-on-disk layout sorted by a key column; minidist ingests CSV into segmented binaries; coordinator parses a basic SQL subset (SELECT/WHERE/GROUP BY with COUNT/SUM/AVG/MIN/MAX), divides queries to per-segment worker processes over MessagePack/TCP, merges partials, and formats results as a text table; netrepl and minilocal are lightweight clients (HTTP to coordinator or single-segment local) for quick querying.

This project models the core ideas behind analytical data engines in a simplified, educational form.

The libraries (crates) used are:

• anyhow for easy idiomatic error handling,
• axum for HTTP API (client-coordinator),
• chrono for datetime operations,
• clap for CLI,
• csv/rmp/serde for CSV/MP serialization,
• pest for SQL grammar/parsing,
• tokio for async & RPC (coordinator-workers),

This project is my own implementation of a semester assignment shared by a friend.