■Thestability and persistence of the server, the expansion and upgrading of thesystem will not affect the service, the multi-server cooperative work willexert the best performance, when the service ability of the service system isexceeded, how to ensure the system does not go down;

■For the server to do a goodjob of optimization, reduce performance loss, sharing the pressure of theserver;

■Load balancing support forvirtual machine in cloud data center environment;

■Enhance the ability toresist DoS/DDoS to ensure the security of application business;

■Business systems providecontinuous services, improve resource efficiency, and protect existinginvestments in the development process.

Depp Technology has a long-term accumulation in thefield of network security and application delivery, integrated server healthinspection, server load balance, application optimization, security protectionand other advanced technologies in one, put forward server load balance andoptimization solutions, Provide integrated application delivery capability forbusiness systems. 

Server load balancing and optimization is actually aset of systems that need to synchronize and optimize all nodes of data flow, soas to enhance the whole business process and service capabilities, andultimately achieve business security, stability and sustainability.

Figure 1 Application delivery of multifunctional fusion

■ Intelligent scheduling and the maximum utilization of server resources

According to the demand of server load balancing, by enabling the "virtual server IP" proxy function, the user accesses the "virtual server IP", and the application delivery device ADX3000 passes the optimal health check and load balancing scheduling algorithm. In order to ensure the response speed and business continuity of the business system, the client access request is distributed to each server of the business system reasonably. At the same time, the adjustment of the internal server is invisible to the access users, and the changes in the physical failure, replacement and addition of the server are not aware of. Makes the business robust to be improved.

Figure 2 Server load balancing

 ■ Improving user experience based on quality of Service delivery

When the processing performance of the server reaches the upper limit, the traditional load balancing will continue to distribute the request to the real server, which will eventually lead to the server downtime, and the service. ADX3000 can limit the number of connections between the access source IP and the destination IP. When the Web server is completely down or reaches the maximum number of concurrent connections set, ADX3000 allows users who exceed the server limit to queue and wait while pushing a friendly prompt page to the user. Once the resources are free, you can access the system and improve the user's access experience.

Figure 3 friendly Tip Page push

■ Load application optimization, release server pressure

At the same time, ADX3000 carries over the high energy consumption work undertaken by the server, such as SSL uninstall HTTP compression, which allows the server to focus more on the service capability of the business itself; by caching frequently accessed resources in devices and sessions, etc., Make the business more smooth, enhance user access experience.

Figure 4 Multi-application optimization improves server efficiency

Through real-time monitoring of server inflow and outflow flow, connection number and CPU utilization rate, the application delivery equipment enables the operators to grasp the health status of the server in real time, and to see at a glance the running situation of the server. Server condition exception can be timely response.

  ■ Virtual machine perception, and VMware cloud platform linkage

With the development of user business system, the virtual data center needs to share the business of virtual machine. ADX3000 supports load balancing of virtual machine, and realizes the following optimization function by linkage with mainstream cloud platform such as VMware.：

·Automatically aware of the presence of virtual machine, according to the number of business requests automatically notify cloud platform increase, delete, restart virtual machine, to ensure rapid business response

·Dynamic scheduling according to the virtual machine state, such as increasing the service pressure for the new virtual machine and decreasing the service pressure for the pre-off line.

Figure 5 load balancing of virtual machine data center

■Security, the last line of defense in the business system

Server load balancing, as the equipment closest to business system, needs to have certain security protection capability. ADX3000 naturally possesses "safety gene", and integrates rich security features. ADX3000 provides state firewall function. It can effectively identify all kinds of network layer and application layer attacks, and resist the danger outside the business system. Especially, it can be used to defend against SYN flooding, DNS Query loodd, HTTP Get flooding CC attacks and so on. Further realize the multi-level security protection of the business system.

The server load balancing and optimizing solution of Depp technology can speed up the whole process from access end to service side, and ensure that the service ability of the whole business process is improved. The overall solution has the following advantages：

■ Multifunctional Fusion to reduce user TCO

Combining the application delivery functions together, it can provide server load balancing, DDoS optimization, cache, compression and other security protection functions, so as to ensure the speed, security and availability of the application.

■Powerful application customization ability to adapt to differential application environment

This paper provides a programmable strategy based on ADL language, combined with the powerful technical customization capability of Depp technology, to meet the personalized requirements caused by application service differentiation. For example, it can meet the server load balancing requirements of application services such as Radius CacheCache DHCP Web in different industries.

■ Extensive network adaptability

It can fully support IPv4/IPv6 application service identification and scheduling, enrich routing exchange protocol to meet various network requirements, the overall scheme can effectively protect the user purchase investment.

■ High reliability of telecommunication

Dual power supply, data plane and control plane are separated by N: M virtualization technology, which can effectively reduce single point failure and ensure 99.999% telecom grade reliability.

■ The ability to grow sustainably

Multi-server load equal-virtual data center load balancing-global load balancing. ADX3000 can continuously provide optimized service to users during the growth process of user business system, and grow with user business system.

Deep-Tech server load balancing and optimization solution, load balancing, application acceleration, virtual machine awareness, security protection, through a strong customization and ADL programming language, The best solution for server load balancing and optimization is to speed up the whole process from access to server to ensure the improvement of service capability of the whole business process.