Application delivery for Server Load balancer and routes (1)

Today, every time you make a mobile phone call, read the news on the main portal website, and make an online bank transaction, your access information will go through the Server Load balancer device, it ensures massive network application access in the background. We can see that it is by our side.

Sudden increase in network traffic: the emergence of independent Load Balancing Devices

There were not many early Internet applications, mainly Email, chat, Webpage Browsing and other activities, so that they could be interconnected. This is like rural transportation. As long as the road is straight and wide, it is no problem to start a car. Under such circumstances, Cisco and Huawei routers and switches have become the mainstream network construction in the initial stage.

However, with the rise of e-commerce and WEB2.0 collaboration technologies, online videos, online banking, securities, and other applications are becoming more and more in-depth on the network. Even if the basic network link is good, for example, 10-gb switching, 1-gigabit routing, and optical fiber cabling all have many problems such as slow access speed of key applications, which brings a lot of trouble to users. The reason is simple. Because of the complexity and diversity of applications, especially the access to the Internet by enterprise intranet applications, the network is no longer as easy as interconnection. This is like urban transportation. If the optical path is well repaired, the problem cannot be solved. The Planning and Management of routes play a major role.

Nowadays, more and more enterprise e-commerce network applications are available, and the promotion of MMS applications has new requirements on network bandwidth. With the emergence of domestic video websites, the streaming media has formed a huge access volume, higher network traffic processing capability is required.

To solve the network traffic bottleneck problem, we need to manage the network traffic well and share the load. In this case, an independent Server Load balancer device has previously had the Server Load balancer technology ).

In recent years, Server Load balancer has been applied to telecom, mobile, banking, large websites, and other enterprises first, because of its most prominent network traffic bottleneck. That's why every call goes through a Server Load balancer device. In addition, with the development of key network application services in many enterprises, the application requirements of Server Load balancer are also growing.

Change Server Load balancer to application delivery: essential changes in technology

A decade ago, few people knew about network load balancing technology. Ten years later, network load balancing has become an important technology for network applications. More importantly, when Server Load balancer develops from a single technology to an independent device, its application functions change essentially,

Let's try again: What is Server Load balancer technology?

Server Load balancer (Load Balance) is used to Balance and distribute loads to multiple operation units for execution, for example, the Web server, FTP Server, Enterprise key application server, and other key task servers can work together to complete tasks.

Server Load balancer has two meanings: first, a single heavy load operation is shared to multiple node devices for parallel processing. After each node device finishes processing, the results are summarized and returned to the user, the system processing capability has been greatly improved, which is also known as cluster ing tering.

The second layer means that a large amount of concurrent access or data traffic is distributed to multiple node devices for separate processing, reducing the user's waiting time for response, this mainly targets Web servers, FTP servers, key enterprise application servers, and other network applications.

Modern Server Load balancer technology usually operates on Layer 4 or Layer 7 of the network. This is a server Load balancer Technology for network applications. It is completely isolated from switches and servers and becomes an independent technical device. This is the object we will discuss now.

Generally, Server Load balancer is divided into seven layers based on different network layers. The second layer of Server Load balancer refers to the use of multiple physical links as a single aggregation logical link, which is the link aggregation Trunking) technology. It is not an independent device, it is a common technology used by switches and other network devices.

As you can see, traditional Server Load balancer is only a load balancing technology. Currently, in the face of complex network application requirements, the independent Server Load balancer device has multiple technical functions including local Server Load balancer, link Server Load balancer, global Server Load balancer, WAN optimization acceleration, XML acceleration, TCP optimization management, Link Management, and ssl vpn..

"Server Load balancer" is no longer a simple Server Load balancer device. It has become a comprehensive solution for application delivery.

At this time, F5, Radware and other Server Load balancer vendors have proposed the concept of "application delivery" to replace the traditional concept of Server Load balancer.

Gartner: The application delivery market will replace the load balancing Market