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Quickly understand the principles and configurations of Nginx load balancing and nginx Load BalancingWhat is Server Load balancer? When a server has more traffic per unit time, the server is under greater pressure and exceeds its capacity, the server will crash. To avoid server crashes and provide a better user experie
consideration based on the characteristics of the cluster during cluster deployment, it combines different algorithms and technologies.3.1 Rotation MethodRotation algorithms are the simplest and easiest way to implement all scheduling algorithms. In a task queue, each member (node) in the queue has the same status. The rotation method simply rotates and selects members in the group. In the load balancing e
-speed cache technology of the proxy server to provide beneficial performance. However, it also has some questions. First, you must develop a reverse proxy server for each service. This is not an easy task. Although the reverse proxy server itself can achieve high efficiency, for each proxy, the proxy server must maintain two connections, one external connection and one internal connection, therefore, the load on the proxy server is very large for ext
repeatedly, the algorithm is able to flow (session) to ensure that traffic from the same client can be processed all the time on the same server.6.URL HashAn algorithm that forwards requests sent to the same URL to the same server by managing a hash of the client's request URL information.The method of load balancing algorithm (DNS->数据链路层->IP层->Http层) 1.
/// ///weighted round robin algorithm/// Public Static classWeightroundrobin {Private Static Objectobj =New Object(); Private Static intpos =0; Staticdictionarystring,int> dic =Newdictionarystring,int> { { "192.168.1.12",1}, {"192.168.1.13",1 }, { "192.168.1.14",3}, { "192.168.1.15",1}, {"192.168.1.16",1}, {"192.168.1.17",1 }, { "192.168.1.18",1}, {
, each cluster node is selected in turn under the same status. This algorithm is widely used in DNS domain name round robin.The rotation method is predictable, and the opportunity for each node to be selected is 1/N. Therefore, it is easy to calculate the node load distribution. The rotation method is typically applicable when the processing capability and performance of all nodes in the cluster are the sam
The most commonly used is F5 and Citrix NetScaler Load balancing is divided into global load balancing and local load balancing. Load balancing
the number of VIPs will be more.Nginx can be used as the LVS node machine, one can use Nginx function, the second is the performance of Nginx can be used. Of course, this level can also directly use the function of Squid,squid is weaker than Nginx, performance is also inferior to nginx.Nginx can also be used as a middle-tier agent, this level nginx basically no opponent, the only one can shake Nginx only lighttpd, but lighttpd at present has not been able to do nginx full function, configuratio
the number of VIPs will be more.Nginx can be used as the LVS node machine, one can use Nginx function, the second is the performance of Nginx can be used. Of course, this level can also directly use the function of Squid,squid is weaker than Nginx, performance is also inferior to nginx.Nginx can also be used as a middle-tier agent, this level nginx basically no opponent, the only one can shake Nginx only lighttpd, but lighttpd at present has not been able to do nginx full function, configuratio
Large Web site-load Balancing architectureExcerpt from: http://www.cnblogs.com/and/p/3366400.html Load Balancer load Balancing is built on the existing network structure, it provides a cheap and effective transparent method to extend network equipment and server bandwidth, i
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 Balancer load Balancing is built on the existing network structure, it provides a cheap and effective transparent method to extend network equipment and server bandwidth, increase throughput, enhance network data processing ability, improve network flexibility and availability.a powerful tool for large web site load
efficiency, for each proxy, the proxy server must maintain two connections, one external connection and one internal connection, therefore, the load on the proxy server is very large for extremely high connection requests. The reverse proxy can execute the load balancing policy optimized for the application protocol, and only access the idle internal server at a
. A good user experience on the Internet allows the user to select the fastest network link for Internet access, improving the network access speed. However, in the actual network environment, as an Outbound link load balancing device, the above 1st items are met, and there are basically no problems with all kinds of products, however, it is very difficult to meet both the 2nd and 3rd items. Let's first loo
Http://publish.it168.com/2006/0315/20060315030001.shtml 1. DNS load balancing method The RR-DNS (round-robin Domain Name System) takes turns by: In a DNS server,You can configure the same name for multiple IP addresses. When the c
This article mainly introduces the related functions of Nginx Plus, which spans the various versions of Nginx plus R5/R6/R7/R9. The more advanced usage of Nginx reverse proxy and load balancing is involved. Mainly include: HTTP load balancer, HTTP long connection, TCP and UDP load
from the entire LVS structure, director server is the core of the entire LVS, currently, the operating system for director server can only be Linux and FreeBSD, The linux2.6 kernel can support LVS without any setup, and FreeBSD as a Director server is not a lot of applications, performance is not very good. For real Server, almost all system platforms, Linux, Windows, Solaris, AIX, BSD series can be very well supported.3.4 Balancing StrategyLVS suppo
) services, and DNS services. Now the load balancer is also starting to support the database service, called the database load balancer.Server load Balancing has three basic feature: Load Bala
writing our own code to achieve redirection. 2: reverse proxy load balancing implemented by Varnish Another idea is to use the Server Load balancer function of the reverse proxy server. The varnish mentioned in the previous article supports this function and view the configuration file: ? Backend web1 { . Host = "192.168.0.77 "; . Port = "808
member (node) in the queue has the same status. The rotation method simply rotates and selects members in the group. In the load balancing environment, the balancer sends new requests to the next node in the node queue in turn. In this continuous and cyclical manner, each cluster node is selected in turn under the same status. This algorithm is widely used in DNS
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