🟢 Nginx Introduction
What Is Nginx?
Nginx (pronounced "Engine-X") is like a restaurant host — when a guest (request) arrives, the host quickly determines: should this person go to the main hall (static assets) or a private room (backend service)? Then directs them accordingly.
Nginx is a high-performance web server and reverse proxy server. It's known for its extremely low memory consumption and exceptional concurrency — capable of handling tens of thousands of connections simultaneously.
💡 Tip: 💡 Over 40% of websites worldwide use Nginx, including major companies like Netflix, Dropbox, and WordPress.com.
Nginx vs Apache
| Comparison | Nginx | Apache |
|---|---|---|
| Architecture | Event-driven, async non-blocking | Process/thread-driven |
| Concurrency | Tens of thousands of connections easily | Hundreds to thousands (needs more tuning) |
| Memory Usage | Very low | Relatively high |
| Static Files | Extremely fast | Good |
| Reverse Proxy | Native support, concise config | Requires extra modules |
| Config Style | Centralized, concise | .htaccess distributed, flexible but slower |
| Learning Curve | Moderate | Gentle |
What Can Nginx Do?
- 🌐 Web Server: Host static websites (HTML, CSS, JS, images)
- 🔄 Reverse Proxy: Forward requests to backend apps (Node.js, Python, Java)
- ⚖️ Load Balancer: Distribute traffic across multiple servers
- 🔒 SSL Termination: Handle HTTPS encryption/decryption
- 📦 API Gateway: Unified API entry point management
- 🚀 Caching: Cache backend responses to speed up access