round robin load balancing algorithm

Brief introductionHaproxy is a free and open source software written in the C language that provides high availability, load balancing, and application proxies based on TCP and HTTP. Haproxy is especially useful for Web sites that are heavily loaded, and often require session-hold or seven-tier processing. The haproxy runs on the current hardware and can support tens of thousands of concurrent connections.

on the Web server. (1) The upstream command of the scheduling algorithm nginx is used to specify the backend servers used by proxy_pass and fastcgi_pass, that is, the reverse proxy function of nginx, therefore, the two can be combined to achieve load balancing, while nginx also supports multiple scheduling algorithms: 1. Round

Protocol shunting for outgoing link load balancing in the previous article "outgoing link load also needs intelligent DNS resolution" http://www.bkjia.com/net/201206/136614.html This section describes how to balance the distribution of carrier addresses by controlling DNS resolution to achieve link traffic balancing. I

%20CENTER%202000%20 Component Load Balancing Technology Overview. files/clbovr01.gif Figure 1 Typical topology of the application Center cluster Software on a Web-tier cluster (ASP pages, and so on) can create and use COM + components on the local computer, or create and use COM + components on another remote computer by using distributed COM. If there is no CLB, the remote activity will be static because

analysis of RR and Ip_hash strategy in Nginx load Balancing 　　 Nginx upstream currently supports the distribution of load balancing methods 　　1, RR (default) Each request is assigned to a different backend server in chronological order, and can be automatically removed if the backend server is down. For example:

DNS load balancing is the first implementation of load balancing technology. Configuring the same name for multiple addresses in a DNS configuration file is configured with multiple A records pointing to a different IP, and the client will randomly obtain one of the addresses when querying this a record. It is not diff

Original http://nginx.org/en/docs/http/load_balancing.html This article is translated according to your own understanding Load Balancing among multiple applications is a commonly used technology to improve resource utilization, increase server throughput, reduce latency, and ensure application fault tolerance. Nginx can serve as an efficient HTTP Load balancer to

servers, 192.168.81.51 and 192.168.81.234 One VIP 192.168.81.229 Each of the above redis-server instances starts with port 6379. The VIP is on the master, and the round robin is switched to one of the servers. (The data volume of each customer is different, and redis is basically a persistent connection. Unlike Http, it is not completely load balancing) Master s

Options list box. This allows the client to access the Web server in the notebook each time. When the above settings are completed, the DNS server realizes the Network Load Balancing function, the client's access is shared on each Web server, and the network traffic across the subnet is reduced, which greatly reduces the communication burden of the enterprise network. Full version: Now the scale of the

Three, load Balancing algorithmCommon load balancing algorithms include, polling, random, least link, source address hash, weighting, etc.3.1 PollingDistribute all requests, in turn, to each server, which is appropriate for the same scenario as the server hardware.Advantage: The number of server requests is the same;Di

? For example, can a Web browser get several images from a Web page from a different host in the cluster? This speeds up processing and shortens response times for customers.Windows Load Balancing enables all cluster hosts on a subnet to simultaneously detect network traffic that is delivered to the cluster's primary IP address (and other IP addresses of multihomed hosts). On each cluster host, the Network

Flume load Balancing is the choice of a certain algorithm per sink output to the specified place, if the file output is very large, load balancing is still necessary, through the output of multiple channels to alleviate the output pressureFlume built-in

theory, can still find a can use the Non-linear hash algorithm (for example sha1/ 256 and so on, so that the input can still fall evenly on the interval [1..N]. 4. Multi-level routing In practice, the preceding routing hash operation is not performed at just one point, but may be done at multiple levels, such as: Network layer lb Technology LVs (Linux Virtual Server), front-end agent (HTTP reverse proxy with round

1.http REDIRECT Load BalancingThe HTTP redirect server is a normal application server whose only function is to compute a real Web server address based on the user's HTTP request and write the Web server address to the HTTP redirect Response (location header)The status code is 302, which is returned to the user's browser. Both the load server and the Web server are the IP of the public network.This kind of

; proxy_pass http: // tomcats ;}}} 2. Use this configuration file to start nginx (disable nginx before startup) [Root @ iZ28b4kreuaZ bin] #/usr/local/nginx/sbin/nginx-c/usr/local/nginx/conf/nginx-tomcat.confIi. Detailed description of the configuration file: Worker_processes 2; events {worker_connections 1024;} http {include mime. types; default_type application/octet-stream; # configure a group of backend servers for upstream, # after the request is forwarded to upstream, nginx sends a request

difficult in mathematics, this is not the problem in the title, because the NP-complete problem can generally find a very effective approximation algorithm to solve. 2. Dynamic load Balancing Dynamic load balancing is the purpose of assigning tasks to

mathematics, this is not the problem in the title, because the NP-complete problem can generally find a very effective approximation algorithm to solve. 　　2. Dynamic load Balancing Dynamic load balancing is the purpose of assigning tasks to

Nginx load balancing-Overall architectureNginx Version: 1.9.1My blog: http://blog.csdn.net/zhangskdThe Load Balancer module currently available in Nginx:Ngx_http_upstream_round_robin, weighted polling, an equalization request, is the default HTTP load balancing

according to the load balancing type (active/active, active/standby ,...), the user can only see a single IP Address outside. As for how many servers are there, the user does not need to know (like the concept of cluster and cloud computing ). Figure 1 distributed user vs server farm (Web server farm) Figure 2 the red arrow shows the Failover architecture (HA), which has different functions than

: With complex local least-based connection algorithm (LBLCR) is not a target IP and a server connection between the record, he will maintain a target IP to a set of servers between the mapping relationship, to prevent the single-point server responsible for too high7: The target address hash scheduling algorithm (DH) is also based on the destination IP address through the hash function of the target IP and