Large-scale networks are generally composed of a large number of dedicated technical equipment, such as including firewalls, routers, Layer 2/3 floors, load balancing equipment, buffer servers, and web servers. How to organically combine these technical devices, is a key issue that directly affects network performance.
With the development of e-commerce and e-government, online transactions and visits will increase significantly. The daily operations of the company and various office services are migrated, and the transfer is not only general text information, but also a lot of videos and voice. For example, the remote teaching is in the ascendant, many colleges have established network teaching points across the country, conduct distance teaching and online counseling, and all sites must be able to communicate with the network teaching center. In this case, it will also generate a large concurrency. Access, thus requiring the network center server to have a lot of capacity to access the service. In this way, the processing capabilities of the network center server and I / O capabilities have become a bottleneck providing service. If the customer's increase leads to the band of traffic exceeds the range of the server, the result is inevitably downtime. Obviously, the limited performance of single servers cannot solve this problem, and one ordinary server can only reach hundreds of thousands of requests per second, and will not handle millions of even more than one second. Request. But if you can make 10 such servers into a system, all requests are allocated to all servers via software technology, then this system completely has millions of or more requests per second. This is the advantage of utilizing server clusters to achieve load balancing.
Early server clusters are usually backed up in the optical fiber mirror card. Let the service operator headache is a key server or more applications, and the data traffic is generally not too low, while the service operators have flowers 2 servers, but they often only get the performance of a server. Translate the different IP addresses of multiple server network cards into a virtual IP address through LSANT (LOAD SHARING NETWORK ADDRESS TRANSFER), so that each server is always in the working state. It turns out that the work that needs to be done with a small machine is completed by multiple PC servers. This elastic solution is quite obvious to investment protection, which avoids the huge equipment investment brought by small machine rigid upgrades. Repeated investment of personnel training. At the same time, the service operator can adjust the number of servers at any time according to the needs of the business.
The network design structure that can perform load balancing is a symmetrical structure, and each server has an equivalent position in a symmetrical structure, and services can be provided separately without the auxiliary of other servers. Then, the external transmission request can then be uniformly assigned to each server in the symmetric structure evenly, and the server receiving the connection request is independently responding to the customer's request. In this configuration, the Web server is not difficult because the establishment of a Web server is not difficult, so load balancing technology has become a key technique for establishing a high load web site.
Load balancing is based on existing network structures, providing a low-cost way to extend server bandwidth and increase throughput, enhance network data processing capabilities, and improve network flexibility and availability. Load balancing mainly completes the following tasks:
Solve network congestion issues, provide services to the service, realize geographical locations;
Provide users with better access quality;
Improve server response speed;
Improve the utilization efficiency of servers and other resources.
Optimization in the user and the server-side use load balancing policy can ensure smooth flow of network information to the greatest extent.
Here is a few load balancing switches for you to buy.
Figure 1: Piolink 1508 NLB / PIOLINK 1608 NLB
Buying more bandwidth has become the most expensive way to improve network speed. Piolink 1508 NLB / PIOLINK 1608 NLB will increase the network bandwidth by using a low cost bandwidth due to the special network cable. In addition, Piolink 1508 NLB / Piolink 1608 NLB optimization line also has functions that monitor and control traffic through intelligent management, ensuring your network continuous operation, no failure. Figure 2: United States Never Networks (INC.) Serveriron No. 4-7 Load Balancing Switch
The main features of the new Serveriron450 and 850 and TrafficSironWare Application exchange enhancements include: 1, in terms of connection performance and rejection service (DOS) attack protection performance increased by 4 times, achieving unprecedented application performance and security. The number 4 of the four-layer connection of these two switches is as high as 300,000, which can resist DOS attacks of 4 million TCP SYN packets per second in the case of maintaining legal user traffic. 2. Implementing the server including the high density gigabit connection of the blade server group, support up to 112 Gigabit Copper and Gigabit Fiber Ethernet ports in a chassis, and putting the second third level high-level exchange and route and Layer 4-7 Application Exchange Capability is integrated into one platform. 3, the third generation content analysis engine, greatly increase the security and availability of the application, and support a large number of key business applications, including HTTP, SOAP, XML, FIX, WAP, SIP, and more. Highly flexible and customized content engines can complete complex check, filter, exchange, and prioritize the application traffic, thus maximizing the availability and security of the application. 4, the most perfect and efficient DNS security and usability solutions, providing transaction rate limits, DNS filtration, DNS caches, and load balancing and transparent failover functions, thereby achieving real critical business DNS infrastructure. The standard configuration of the ServerIron450 and 850 switches is as follows: • Serveriron 450: 4 slot chassis, with a new generation of web exchange management modules (WSM6) and can insert up to 3 JetCore ASICs extensions groove. Each chassis supports up to 48 10/100 and Gigabit Ethernet ports (copper cables and fiber) ports. · Serveriron 850: 8 slot chassis, with a new generation of Web Exchange Management Modules (WSM6) and an extended slot that can insert up to 7 JetCore ASICs 10/100 and Gigabit Ethernet modules. Each chassis supports up to 144 10/100 and 112 Gigabit Ethernet (copper cables and fiber) ports.
Figure 3: 3COM Superstack 3 server load balancing switch
This high-performance, dedicated load balancing switch greatly improves network server performance through efficient data traffic balance between multiple servers and the server requests. This product is designed for network environments that require high management and availability, but do not require scalability. Rich security will protect your server, while flexible design will also guarantee high availability of the server. Product features and features: support up to 16,000 synchronous TCP connections, or approximately 1000 synchronous client sessions; support up to 12 servers and connections, and increase the number of supported servers to 256 through the second layer switch; Install, the setting process based on the wizard program allows you to use it; 6 load balancing algorithms can intelligently determine the optimal flow load level of each server; line speed transmission and redundant load balancing configuration is implemented Maximize uninterruptible operation function; automated server running status check and seamless conversion ensures uninterrupted operation; independent of server operating system, its architecture supports more flexible server deployment; integrated security filtering function protection The user's server is from "denial service" attack; convenient, automated upgrade prompt users can always maintain synchronization with the latest technology; advanced e-commerce applications can support all kinds of e-commerce financial transactions; web-based management allows users to make users freely Monitoring and management; redundant power supplies for option products can effectively avoid server load balancing power system failure. Figure 4: Radware's link traffic management application switches - Local and global server traffic management application switches WSD (Web Server Director )
Radware's link traffic management application switches (also known as link traffic load balancer) LinkProof Application Switch, multi-links to access the Internet are traffic management. Radware's safety application switches FireProof can be loaded on the company's multiple firewalls FireWall, VPN, IDs. Radware's server application switches WSD can do load balancing for various MAIL, Web, DNS, FTP, RADIUS, REAL Server, MMS Server. First, the WSD reliable status monitoring mechanism guarantees the best service. WSD can monitor the working status of all protocol layers such as IP, TCP, UDP, application, and content. If a fault is found, the user is transparently redirected to the normal work server. This ensures that users can always get information they expect. When a server upgrade or system maintenance is required, the WSD guarantees a stable server to exit the service to avoid service interrupts. When a server is selected to exit the service, WSD will not assign any new users to the server. However, it can be the server to complete the service of the current user. This guarantees uninterrupted quality services and simplifies the management of server groups. When you apply a restarted server to your service, avoiding system failures due to sudden flow shocks due to sudden traffic shocks. Therefore, when the new server introduces the server group, WSD will gradually increase the traffic assigned to the server until it reaches its complete processing power. There is thus not only guarantee that the user can obtain uninterrupted services when the server is exited at the server. WSD determines traffic allocation based on IP addresses, application types, and content classes. This way, administrators can assign different server resources for different types of applications. Application exchange supports various applications on different protocols, including TCP, UDP, IP, Telnet, Rshell, TFTP, Media stream, passive FTP, HTTP, MAIL, DNS, VOIP, and more. Radware also designs special support functions for applications running in dynamic ports and requires synchronization. WSD can be managed via CLI, Telnet, web application, HPOV plugin, and Radware's ConfigWare (based on Java platform graphics management programs). This independent platform management system allows you to manage your device very conveniently. Its intuitive layout and easy-to-use menu and wizard, the user can gradually complete the system configuration and back up the configuration content. ConfigWare also provides statistics to help you better understand the traffic demand of your network and effectively manage server resources. Figure 3: 3COM Superstack 3 server load balancing switch
This high-performance, dedicated load balancing switch greatly improves network server performance through efficient data traffic balance between multiple servers and the server requests. This product is designed for network environments that require high management and availability, but do not require scalability. Rich security will protect your server, while flexible design will also guarantee high availability of the server. Product features and features: support up to 16,000 synchronous TCP connections, or approximately 1000 synchronous client sessions; support up to 12 servers and connections, and increase the number of supported servers to 256 through the second layer switch; Install, the setting process based on the wizard program allows you to use it; 6 load balancing algorithms can intelligently determine the optimal flow load level of each server; line speed transmission and redundant load balancing configuration is implemented Maximize uninterruptible operation function; automated server running status check and seamless conversion ensures uninterrupted operation; independent of server operating system, its architecture supports more flexible server deployment; integrated security filtering function protection The user's server is from "denial service" attack; convenient, automated upgrade prompt users can always maintain synchronization with the latest technology; advanced e-commerce applications can support all kinds of e-commerce financial transactions; web-based management allows users to make users freely Monitoring and management; redundant power supplies for option products can effectively avoid server load balancing power system failure. Figure 4: Radware's link traffic management application switches - Local and global server traffic management application switches WSD (Web Server Director )
Radware's link traffic management application switches (also known as link traffic load balancer) LinkProof Application Switch, multi-links to access the Internet are traffic management. Radware's safety application switches FireProof can be loaded on the company's multiple firewalls FireWall, VPN, IDs. Radware's server application switches WSD can do load balancing for various MAIL, Web, DNS, FTP, RADIUS, REAL Server, MMS Server. First, the WSD reliable status monitoring mechanism guarantees the best service. WSD can monitor the working status of all protocol layers such as IP, TCP, UDP, application, and content. If a fault is found, the user is transparently redirected to the normal work server. This ensures that users can always get information they expect. When a server upgrade or system maintenance is required, the WSD guarantees a stable server to exit the service to avoid service interrupts. When a server is selected to exit the service, WSD will not assign any new users to the server. However, it can be the server to complete the service of the current user. This guarantees uninterrupted quality services and simplifies the management of server groups. When you apply a restarted server to your service, avoiding system failures due to sudden flow shocks due to sudden traffic shocks. Therefore, when the new server introduces the server group, WSD will gradually increase the traffic assigned to the server until it reaches its complete processing power. There is thus not only guarantee that the user can obtain uninterrupted services when the server is exited at the server. WSD determines traffic allocation based on IP addresses, application types, and content classes. This way, administrators can assign different server resources for different types of applications. Application exchange supports various applications on different protocols, including TCP, UDP, IP, Telnet, Rshell, TFTP, Media stream, passive FTP, HTTP, MAIL, DNS, VOIP, and more. Radware also designs special support functions for applications running in dynamic ports and requires synchronization. WSD can be managed via CLI, Telnet, web application, HPOV plugin, and Radware's ConfigWare (based on Java platform graphics management programs). This independent platform management system allows you to manage your device very conveniently. Its intuitive layout and easy-to-use menu and wizard, the user can gradually complete the system configuration and back up the configuration content. ConfigWare also provides statistics to help you better understand the traffic demand of your network and effectively manage server resources. Figure 3: 3COM Superstack 3 server load balancing switch
This high-performance, dedicated load balancing switch greatly improves network server performance through efficient data traffic balance between multiple servers and the server requests. This product is designed for network environments that require high management and availability, but do not require scalability. Rich security will protect your server, while flexible design will also guarantee high availability of the server. Product features and features: support up to 16,000 synchronous TCP connections, or approximately 1000 synchronous client sessions; support up to 12 servers and connections, and increase the number of supported servers to 256 through the second layer switch; Install, the setting process based on the wizard program allows you to use it; 6 load balancing algorithms can intelligently determine the optimal flow load level of each server; line speed transmission and redundant load balancing configuration is implemented Maximize uninterruptible operation function; automated server running status check and seamless conversion ensures uninterrupted operation; independent of server operating system, its architecture supports more flexible server deployment; integrated security filtering function protection The user's server is from "denial service" attack; convenient, automated upgrade prompt users can always maintain synchronization with the latest technology; advanced e-commerce applications can support all kinds of e-commerce financial transactions; web-based management allows users to make users freely Monitoring and management; redundant power supplies for option products can effectively avoid server load balancing power system failure. Figure 4: Radware's link traffic management application switches - Local and global server traffic management application switches WSD (Web Server Director )
