Rover

In-memory key-value store inspired by Redis, rewritten from the ground up in Go.

🚀 Introduction

Rover is a lightning-fast, in-memory key-value store that combines the simplicity of Redis with the power of Go. Built from scratch, Rover leverages Go's robust concurrency features and performance optimizations to deliver a high-performance data storage solution.

✨ Features

• 🚄 Blazing Fast: In-memory storage for rapid data access
• 🔄 Concurrent: Utilizes Go's goroutines for efficient multi-client handling
• � Persistence: Dual persistence mechanisms (AOF & RDB) for data durability
• 🔌 Standalone Mode: Run Rover as a standalone server
• 🔐 Secure: (TODO: Add security features)
• 🫙 Managing Databases: Out of the box, a Rover instance supports 16 logical databases
• 🎨 Beautiful CLI: Eye-catching command-line interface with color support
• 👾 Robust Command Support:
  • Data Commands: ping, get, set (with options: NX/XX, EX/PX, GET), del, exists, append
  • Counter Commands: incr, incrby, decr, decrby
  • Persistence Commands: save (synchronous save), bgsave (background save)
  • Utility Commands: flushall (clear all keys), strlen (check string length)

🛠 Installation

docker run -d --name rover -p 6379:6379 subrotokumar/rover

💾 Persistence

Rover supports two persistence mechanisms to ensure your data is durable:

Append-Only File (AOF)

AOF logs every write operation, allowing complete data reconstruction by replaying commands.

Features:

• Real-time command logging
• Three sync policies:
  • always: Sync after every command (safest, slowest)
  • everysec: Sync every second (balanced, default)
  • no: Let OS handle syncing (fastest, least safe)

RDB Snapshots

RDB creates point-in-time snapshots of your dataset at specified intervals.

Features:

• Periodic automatic snapshots (default: every 5 minutes)
• Manual snapshots with SAVE or BGSAVE commands
• Threshold-based saves (default: after 100 changes)

Configuration

Configure persistence using environment variables:

# Disable persistence entirely
DISABLE_PERSISTENCE=true

# Customize AOF settings
AOF_PATH=./data/appendonly.aof

# Customize RDB settings  
RDB_PATH=./data/dump.rdb

# Enable debug mode
DEBUG_MODE=true

Persistence Commands

• SAVE - Create a synchronous snapshot (blocks until complete)
• BGSAVE - Create a snapshot in the background

Data Recovery

On startup, Rover automatically:

1. Loads the RDB snapshot (if available)
2. Replays AOF commands (if available)

This ensures your data is restored to its last known state.

🌟 Why Rover?

• Go Power: Written in Go for excellent performance and concurrency
• Redis Compatibility: Familiar Redis-like commands and interface
• Lightweight: Minimal dependencies for a small footprint
• Extensible: Easy to add new features and commands

📜 License

Rover is released under the Apache License Version 2.0 License. See the LICENSE file for details.

🙏 Acknowledgements

• Inspired by Redis
• Built with love using Go

Made with ❤️ by Subroto Kumar