GoKV

GoKV is a simple, in-memory key–value store implemented in Go, designed as a lightweight, Redis-compatible alternative for learning, prototyping, or embedded use.

Features

• RESP Protocol Support: Parses and responds using the Redis Serialization Protocol (RESP), supporting most basic Redis commands.
• Commands Supported:
  • SET / GET: Store and retrieve string values.
  • DEL: Delete one or more keys.
  • EXISTS: Check if keys exist.
  • INCR / INCRBY: Atomic integer increment operations.
  • DECR / DECRBY: Atomic integer decrement operations.
  • TTL: Get time-to-live for a key.
  • EXPIRE: Set expiration for a key.
  • PERSIST: Remove expiration from a key.
  • SELECT: Switch between logical databases (multi-DB support).
  • PING: Health check.
  • HELLO: RESP version negotiation.
• SETX Command Extensions:
  • NX / XX: Set if not exists / set if exists.
  • EX / PX: Expiration in seconds or milliseconds.
  • EXAT / PXAT: Absolute expiration in seconds/milliseconds.
  • KEEPTTL: Retain existing TTL.
  • GET: Return old value on set.
• Expiration: Key expiration with millisecond precision.
• Multiple Databases: Supports multiple logical databases, switchable via SELECT.
• Centralized Error Handling: All errors are defined in a single location for maintainability.

Usage

1. Run the server:

   go run ./cmd/gokv/main.go

2. Connect with redis-cli or any RESP-compatible client:

   redis-cli -p 6379

TODO

• Add internal debug logs for easier troubleshooting.
• Add queue support to the store (for future data structures).
• Add mutexes for thread-safe Set and Setx operations.
• Add more advanced Redis commands (e.g., MGET, MSET).
• Improve error messages and RESP compliance.
• Add authentication and ACL support.
• Add more comprehensive tests and benchmarks.