kevy

A single-machine, Redis-compatible key–value server in pure Rust, with zero third-party dependencies — built to push single-box performance toward the hardware limit. (For distribution, use Redis/Valkey; that is not kevy's scenario.)

• Thread-per-core, shared-nothing runtime (busy-poll, lock-free hot path).
• All five Redis data types — String, Hash, List, Set, Sorted Set — backed by modern structures (Swiss tables, a ring-buffer deque, a B-tree), not Redis's legacy encodings.
• RESP2 wire protocol; pub/sub; MULTI/EXEC transactions; cross-shard multi-key commands (MSET/MGET/SINTER/…).
• Durable: RDB-style snapshots + an append-only log (AOF).
• The only C touched is the unavoidable OS-boundary libc, hand-bound in one crate (kevy-sys); everything else is Rust.

cargo run --release -p kevy --bin kevy -- --port 6379
redis-cli -p 6379 set foo bar
redis-cli -p 6379 get foo

Flags: --bind --port --threads --dir --no-aof · env: KEVY_BIND KEVY_PORT KEVY_THREADS KEVY_DIR KEVY_AOF.

For same-host clients, point KEVY_UNIX_SOCKET at a filesystem path and the server dual-binds TCP + Unix-domain socket (RESP semantics identical; ~60–75 % faster than TCP loopback at every workload — see docs/uds.md):

KEVY_UNIX_SOCKET=/tmp/kevy.sock kevy --port 6004
redis-cli -s /tmp/kevy.sock SET foo bar

Built from a small stack of reusable crates: kevy-sys, kevy-resp, kevy-store, kevy-net, kevy-rt, kevy-persist.

License

Licensed under either of MIT or Apache-2.0 at your option.