round robin load balancing

1. Polling Polling is round Robin, which distributes the client's Web requests to different back-end servers sequentially, according to the order in the Nginx configuration file.Examples of configurations are as follows: http{ upstream SampleApp { Server Only 1 DNS portals were inserted into the upstream section, the SampleApp, which was also recalled in the Proxy_pass section later. 2, the least connection Web requests are forw

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 = "8081 ";}Backend web2 {. Host = "192.168.0.77 ";. Port = "8082 ";}Director lb round-robin {{. Backend = web1;}{. Backend = web2;}}Sub vcl_recv {Set req. backend = lb;Return (pass );

. xml introduces the jar packages of Dubbo and Zookeeper and the jar packages of test-maven-api. Because the jar package of test-maven-api is introduced, we call the package in the project as if it were called locally. The Code is as follows: (2) the specific implementation of the test-maven-server-console project is as follows: @Controllerpublic class IndexController {@Autowiredprivate TestRegistryService testRegistryService;@RequestMapping("/hello")public String index(Model model){

Lvswith theNginxload Balancing scheduling algorithm1th Chapter LVSof the10Type scheduling algorithm1.1Static Algorithms: 1.1.1 RR (round robin):Polling scheduling algorithm:the principle of polling scheduling algorithm is to put the user's access request , the average allocation to each Web service node , starting from 1 , to the end of the last server node , and then at the beginning of a new round of loo

18.6 Load Balancing Cluster introduction Main open source software LVs, keepalived, Haproxy, Nginx, etc. The LVS belong to 4 layer (network OSI 7 layer model), Nginx belongs to 7 layer, Haproxy can be considered as 4 layer, can be used as 7 layer The Keepalived load balancing function is actually the L

Ifcfg-bond0 File #vi ifcfg-bond0 The original configuration file is as follows After modification, you need to add a static IP address (NIC bindings do not recommend using dynamic IP), subnet masks, and gateways are as follows (Note: In addition to BOND0 set IP and other information outside the real card can not set IP address) Edit Ifcfg-eth0 File#vi Ifcfg-eth0The original configuration file is as follows After modification Three network adapters are prepared. This environment uses Cent

This article references: Dragon Fruit College: Http://www.roncoo.com/details?cid=85d6008fe77c4199b0cdd2885eaeee53 During cluster load Balancing, Dubbo provides a variety of equalization policies, which are randomly called by default. You can extend your own load balancing policies, see:

message;Note: The first three types are standard, the fourth is the post-add type, the kernel may not be supported by default, and the kernel must be self-compiled(1) The VIP is the public network address, RIP and dip is the private network address, and can not be in the same IP network, but need to communicate with each other through routing;(2) The source IP of the request message received by RS is a dip, so its response message will be sent to the dip;(3) The request message and the response

Tag: Address file path shell script uses Evel Aliyun try directory 127.0.0.1Preparatory workEnvironment: WIN10 under Centos6.4 virtual machine.Load Balancing: Two units (one master and one standby) LVS + keepalived.HTTP Server: 3 units.Configure IP for each server1. VIP (virtual IP): The IP address used to provide the virtual Server service. are bound on the director of a physical network card (external receiving request packet) and the loopback devic

Nginx's load balancing strategy can be divided into two categories: built-in policies and extension strategies. Built-in policies include weighted polling and IP hashes, which, by default, are compiled into the Nginx kernel, simply by specifying the parameters in the Nginx configuration. There are many extension strategies, such as fair, universal hash, consistent hash, etc., by default not compiled into th

Abstract: This article discusses the Server Load balancer technology and load allocation strategies used by distributed network servers, and implements the Server Load balancer gateway on FreeBSD Based on Network Address Translation, it is applied to our internet server and distributes the load to multiple servers to s

Load Balancing(+) (#) During cluster load Balancing, Dubbo provides a variety of equalization policies, which are randomly called by default. You can extend your own load balancing