dual wan load balancing

There is an article on Windows Seventh load balancing, this time about the fourth layer load balancerThe TCP/IP protocol family, the seventh layer is the application layer, and the fourth layer is the transport layer. The fourth tier load balancing is mainly converted via IP

Xiaonuo FVR360V (price: 3900 yuan) Xiaonuo's FVR360V dual WAN port Voice Router FVR360v, a classic product last year, is designed for medium and large Internet cafes, communities, schools, and enterprises and is suitable for the next-generation multi-function broadband access products. The vro has the voice alarm function. This is the world's first talking Firewall Router. It can tell users about networ

Ten LVS cluster scheduling algorithms and load balancing theory, lvs Load Balancing I. Concept of LVS LVS (Linux Virtual Server): Linux Virtual Server; LVS is a server Load balancer device that does not provide any services. When a user requests a Server

Massive Image Distributed Storage and Load Balancing Research, massive Load Balancing Research on Distributed Storage and load balancing of Massive images For Web servers, users' access to image information consumes a lot

, which is usually a major disadvantage, but also a big advantage, because there is not too many configurable options, so in addition to increase or decrease the server, do not need to touch it frequently, greatly reducing the chance of human error.3, the work is stable, because of its own resistance to load capacity is very strong, so the stability is also natural, and a variety of LVS have a complete dual

, which is usually a major disadvantage, but also a big advantage, because there is not too many configurable options, so in addition to increase or decrease the server, do not need to touch it frequently, greatly reducing the chance of human error.3, the work is stable, because of its own resistance to load capacity is very strong, so the stability is also natural, and a variety of LVS have a complete dual

upper limit, and there is basically no consumption in memory and CPU. 2. Low configuration, which is usually a major disadvantage, but it is also a major advantage. because there are not many configurable options, you do not need to touch the server frequently except increase or decrease the server, this greatly reduces the likelihood of human error. 3. Work is stable. Because of its strong load resistance capability, high stability is also a logic.

. (Load-balance MySQL, Detect and load-balance the backend DB node) Can be added to some of the drawbacks of Nginx such as session retention, cookie guidance and other work 4.2. Equilibrium strategyFour common algorithms are supported:1.roundrobin: Polling, alternately assigning to backend servers;2.STATIC-RR: Based on backend server performance allocation;3.leastconn: Minimum connector priority;4.

. In addition, various lvs have a complete dual-machine Hot Standby solution, therefore, you don't have to worry about the problem with the balancer itself. If the node fails, lvs will automatically identify the problem, so the system is very stable as a whole. 4. No traffic, as mentioned above. Lvs only distributes requests, but the traffic does not go out of it. Therefore, it can be used to distribute some lines. Without traffic, I/O performance of

, in the stability of high;(4) Security Protection: Hardware equalization equipment In addition to load balancing function, but also has a firewall, anti-DDoS attacks and other security functions;(5) Maintenance angle: Provide a good maintenance management interface, after-sales service and technical support;(6) Local tyrants company: F5 Big Ip Price: 15w~55w range; A10 Price: 55w-100w;Disadvantages1) The p

). Because the network environment has been configured to have only Director responded to ARP broadcasts, the MAC address of the request packet will be changed to the MAC address of the RealServer. That is to say, redireimplements link layer spoofing to replace the target MAC address of the frame data with the MAC address of a RealServer determined based on the load balancing policy. 3. RealServer response

process: the implementation of a cluster requires intra-cluster communication and data transfer for management and content replication. This part of the communication takes up the available bandwidth of the network. In order to overcome the limitations of the single network card, generally use a dual network card, one for the load client communication, the other for the transmission of internal communicati

between nodes to take advantage of the best resources, similar to symmetric multiprocessor systems that can switch applications between processors. Because Mosix implements clustering by modifying the kernel, there are compatibility issues and some system-level applications will not function properly. Load balancing/High availability clusters 3, LVS (Linux Virtual Server)This is a project presided over b

: Using a Linux kernel cluster to implement a high-performance, highly available load-balancing server with good scalability (Scalability), Reliability (reliability), and manageability (manageability).The advantages of LVS are: Anti-load ability, is the work in the Network 4 layer only for distribution, no traffic generated, this feature also determines

(This article applies to TL-ER6120 V1.0, TL-ER5120 V1.0, TL-ER5520G V1.0, TL-R483 V3.0, TL-R478 + V5.0, TL-WVR300 V1.0)Some application environments, such as enterprises or schools, have their own internal network and need to access the Internet. Multiple WAN port routers are selected to connect both the internal network and the Internet. If no corresponding settings are made, the data accessing the internal network may be sent to the Internet. Simila

Copyright Notice: Original works, declined reprint! Otherwise, the legal liability will be investigated.An official description of NLB, you must first understand the principles of NLB before building an NLB cluster Network Load Balancing (NLB) features in Windows server R2 can enhance the availability of Internet server applications such as those used on Web, FTP, firewalls, proxies, virtual pr

technology to actively detect each node.In most LAN-based clusters, the fastest response algorithm does not work well, because ICMP packets in the LAN basically respond within 10 ms, which does not reflect the differences between nodes; if a balance is made on the WAN, the response time is of practical significance for the user to select the server nearby. In addition, the more scattered the cluster topology, the more effective the method can be. Thi

clusters, the fastest response algorithm does not work well, because ICMP packets in the LAN basically respond within 10 ms, which does not reflect the differences between nodes; if a balance is made on the WAN, the response time is of practical significance for the user to select the server nearby. In addition, the more scattered the cluster topology, the more effective the method can be. This method is the main method used for advanced

Original reference: Http://www.cnblogs.com/lovingprince/archive/2008/11/13/2166350.html A Web cluster is made up of multiple servers running the same Web application at the same time, as if it were a server, with multiple servers working together to provide more high-performance services to customers. Cluster more standard definition is: A set of independent server in the network performance of a single system, and a single system of the mode of management, this single system for customer works

1. IntroductionEssentially, network load balancing is an implementation of a Distributed Job Scheduling System. As the controller of network request allocation, the balancer uses a centralized or distributed policy to allocate network service requests based on the current processing capacity of the cluster nodes, it also monitors the valid status of each node in the lifecycle of each service request. Genera