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Redis Clone

An in-memory key-value store in Rust with RESP protocol parsing, string commands, pub/sub, async networking, and an event-driven architecture.

Architecture Overview

The Redis clone is built as a TCP server that accepts RESP-encoded commands, parses requests into command frames, executes them against an in-memory store, and writes RESP responses back to clients.

The implementation emphasizes a small systems surface: async Rust for concurrency, event-driven I/O for connection handling, and explicit command dispatch for predictable behavior.

Technical Challenges

RESP protocol parsing and serialization
connection state management over TCP
pub/sub channel fan-out
command execution without unnecessary shared-state complexity
keeping the implementation readable while preserving systems-level control

Benchmarks

The next benchmark target is a local harness that measures SET/GET throughput, pub/sub fan-out latency, connection scaling, and memory usage under mixed command workloads.

Lessons Learned

Redis-style systems are valuable because the boundary is crisp: parse a wire protocol, maintain predictable in-memory state, and make the hot path short.

Tools

Rust, Tokio, Mio, Async-std