What Is a Load Balancing Network?

Network load balancing is a server set composed of multiple servers in a symmetrical manner. Each server has an equivalent status and can provide services independently without the assistance of other servers. Through some kind of load sharing technology, the requests sent from the outside are evenly distributed to a certain server in the symmetrical structure, and the server receiving the request responds to the client's request independently. Load balancing can evenly distribute client requests to the server array, thereby providing fast access to important data and solving a large number of concurrent access service issues. ^[1]

Network load balancing is mainly used to expand the bandwidth of network devices and servers, increase throughput, and enhance network data processing capabilities.

Load balancing is a strategy that redistributes system load to achieve a relatively balanced load among servers, thereby reducing task response time, improving system resource utilization, and improving system performance. The main issues it resolves are:

1) Solve the problem of network congestion, provide services nearby and realize geographic independence;

2) Provide better access quality for users;

3) Improve server response speed;

4) Improve the utilization efficiency of servers and other resources. ^[3]

Network Load Balancing (NLB) exists hardware and

First, the network

Load balance is based on the existing network structure, which provides a cheap, effective, and transparent method to expand the bandwidth of network devices and servers, increase throughput, strengthen network data processing capabilities, and improve network flexibility. And availability. Load balancing has two meanings: first, a large number of concurrent accesses or data streams are shared among multiple node devices for processing, reducing user response waiting times; second, a single heavy load operation is shared among multiple node devices for parallel Processing. After each node finishes processing, the results are summarized and returned to the user, which greatly improves the system processing capacity. ^[6]

Load balance is mainly used to expand the bandwidth of network devices and servers, increase throughput, strengthen network data processing capabilities, improve network flexibility and availability, and ensure that they can make Quick response to ensure uninterrupted service. ^[2]

Network load balancing allows clients to access the cluster with a logical Internet name and virtual IP address (also known as the cluster IP address), while retaining the name of each computer. ^[2]

(1) DNS load balancing. Configure the same name for multiple addresses in DNS. Clients querying this name will get one of them, so that different clients can access different servers to achieve the purpose of load balancing. ^[2]

(2) Proxy server. The proxy server evenly forwards the request to multiple servers to achieve the purpose of load balancing. ^[2]

(3) Load balancer. Load balancers use various distribution algorithms to distribute network requests to the available servers in a server cluster. Some load balancers are integrated in the switching device and placed between the server and the Internet link. The balancing function is integrated into the PC, one connected to the Internet and one connected to the internal network of the back-end server farm. Load balancers can be particularly effective when the web server is optimized for image services, Secure Sockets Layer (SSL) sessions, or database transactions. ^[2]

In addition to the application of campus network for teaching, scientific research, management, and library information retrieval, it also undertakes tasks such as information exchange, email, announcements, news releases, and access to various public network ports. Because the information transmitted on the network is not only digital, text and graphics, it will gradually increase high-bandwidth applications such as voice, moving images and video images as the application level increases. Therefore, the construction of the network, especially the backbone network, requires high bandwidth and high speed. Applying load balancing technology to the server of the campus network is a cheap solution. ^[2]