What does nginx load balancing mean

Using nginx load balancing can improve performance and availability by using a virtual server to receive requests and forward them to the backend server. Use polling, weighted polling, or minimum connection algorithm to allocate requests. Advantages include: improved performance, increased availability, scalability, and high concurrency processing capabilities.

Load balancing of nginx

Load balancing is a technology that distributes network traffic across multiple servers to improve overall performance and availability. Nginx is a popular web server that provides powerful load balancing capabilities that can help websites and applications handle high traffic.

How to achieve load balancing in nginx

nginx achieves load balancing by using virtual servers and backend servers.

• Virtual Server: The virtual server is responsible for receiving client requests and forwarding them to the backend server.
• Backend server: The backend server is the server that actually handles the request.

Nginx uses various algorithms to decide which backend server to which request is assigned, including:

• Polling: Assign requests to the backend server in order.
• Weighted polling: Assign requests to backend servers with higher weights.
• Minimum number of connections: Assign requests to the server with the least number of connections.

Advantages of nginx load balancing

Load balancing using nginx provides the following advantages:

• Improve performance: By spreading requests across multiple servers, the load on a single server can be reduced, thereby improving overall performance.
• Increase availability: If a backend server goes down, nginx will automatically redirect requests to other servers, thus maintaining application availability.
• Scalability: As traffic increases, more backend servers can be easily added to scale the load balancing system.
• High concurrency processing capability: Nginx can handle a large number of concurrent requests, making it suitable for high-traffic websites and applications.

Configure nginx load balancing

Configuring load balancing in nginx configuration files involves the following steps:

1. Defines a virtual server, specifying the listening port and IP address used to receive requests.
2. Defines the backend server, specifying the server IP address and port used to handle the request.
3. Specifies the load balancing algorithm (polling, weighted polling, or minimum number of connections).
4. Restart nginx to apply configuration changes.

With the above configuration, nginx will start load balancing traffic to a website or application, providing higher performance, availability, and scalability.

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