Nginx
By F5, Inc.
Nginx is a high-performance web server, reverse proxy, and load balancer known for its event-driven architecture and ability to handle very large numbers of concurrent connections efficiently.
Definition
Nginx is a high-performance web server, reverse proxy, and load balancer known for its event-driven architecture and ability to handle very large numbers of concurrent connections efficiently.
Overview
Igor Sysoev created Nginx, pronounced "engine-x," and released it publicly in 2004, aiming to solve the "C10k problem"—handling ten thousand or more simultaneous connections—which traditional thread-per-connection web servers like Apache HTTP Server struggled with at the time. F5, Inc. acquired Nginx, Inc. in 2019. Nginx's core design uses a small number of worker processes, each handling many connections asynchronously through an event loop, rather than spawning a new thread or process per connection. That architecture makes it efficient both as a standalone web server for static content and as a reverse proxy sitting in front of application servers, load-balancing traffic across backends running frameworks like Node.js, Django, or Laravel. Beyond serving traffic directly, Nginx is a common building block inside larger systems: it's frequently used as an ingress controller in Kubernetes clusters, terminates TLS certificates, often via Let's Encrypt, and can be extended with Lua scripting through the OpenResty distribution.
Key Features
- Event-driven, asynchronous architecture for handling many concurrent connections
- Reverse proxying and load balancing across multiple backend servers
- Static file serving with very low memory overhead
- TLS termination and certificate management
- Kubernetes Ingress controller support for routing cluster traffic
- Caching layer for reducing load on upstream application servers
- Configurable via a declarative configuration file
- Extensible with modules and Lua scripting via OpenResty
Use Cases
History
Nginx is a high-performance web server that also functions as a reverse proxy, load balancer, and HTTP cache. It was created by Igor Sysoev specifically to solve the "C10k" problem — efficiently handling more than 10,000 concurrent connections — after he saw Apache struggle with high connection counts. Development began in 2002, a working prototype was completed in 2003, and Nginx was released to the public on October 4, 2004. Its asynchronous, event-driven architecture handled thousands of connections in a single thread rather than spawning a process per connection, delivering major performance and memory advantages, and Nginx became one of the most widely deployed web servers on the internet.
Sources
- Nginx — official website · as of 2026-07-17
- Nginx — "Celebrating 20 Years of NGINX" · as of 2026-07-17