Why Nginx Dominates as the Top Web Server and How to Master It

Nginx Overview

Nginx is an open‑source, high‑performance HTTP server, reverse proxy, mail proxy, and TCP/UDP proxy that has overtaken Apache to become the most widely used web server worldwide.

Why Nginx Is Popular

It was built specifically for performance optimization, offering high efficiency, strong stability, and mature, well‑structured code, which together make it the leading web server.

Major Companies Using Nginx in China

Leading internet firms such as Baidu, JD.com, Tencent, NetEase, and Taobao rely on Nginx for their large‑scale web services.

Core Functions of the Master Process

Read and validate Nginx configuration files.

Open, bind, and close socket connections.

Start, manage, and stop worker processes according to the configuration.

Accept external commands such as restart, upgrade, or shutdown.

Perform graceful upgrades without interrupting service.

Open log files and manage file descriptors.

Handle failed upgrades with rollback.

Compile and execute Perl scripts.

Worker Process Responsibilities

Accept and process client requests.

Dispatch requests to appropriate functional modules.

Perform I/O operations to obtain response data.

Communicate with backend servers and retrieve processing results.

Cache data, query cache indexes, and retrieve cached content.

Send response data back to the client.

Execute commands from the master process (restart, upgrade, exit).

Core Configuration Details

Typical configuration steps start with creating a new site, for example a mobile‑web site, and then defining location blocks to control request handling.

Four‑layer access control is implemented via the ngx_http_access_module, allowing IP‑based restrictions.

File existence checks can be performed with the if (-f $request_filename) directive.

Advanced Configuration

Advanced settings include fine‑tuning worker processes, buffer sizes, and SSL parameters to achieve optimal performance under heavy traffic.

Reverse Proxy

A reverse proxy forwards client requests to internal servers and returns the responses, a common pattern for load balancing and security.

Production Deployment Architecture

The typical production layout includes multiple Nginx instances acting as load balancers in front of application servers, with health checks and failover mechanisms.

For a complete reference, consult the full “Nginx Learning Notes” which cover web service basics, core and advanced configuration, rewrite rules, reverse proxy setup, system parameter tuning, and practical LNMP deployment tutorials.