round robin load balancing algorithm

. Generally, it can support more than 10 thousand concurrent jobs; 5. Nginx can detect internal server faults through ports, such as processing status codes returned by webpages Based on the server, timeout, and so on, and resubmit the returned error requests to another node, however, the disadvantage is that url detection is not supported; 6. asynchronous processing of requests by Nginx can help node servers reduce load; 7. Nginx supports http and Em

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

that starting the Keepalived service automatically generates VIP and IPVSADM rules and does not need to execute the/usr/local/sbin/lvs_dr.sh script mentioned above. Nginx Ip_hash for long connections Upstream Test { Ip_hash; Server 192.168.31.100; Server 192.168.31.101; } server { Listen 80; server_name bbs.aaa.cn; Location/{ Proxy_pass http://test/; Proxy_set_header Host $host; Proxy_set_header X-real-ip $remote _addr; Proxy_set_header x-fo

processing node is to review the future processing speed based on the previous processing speed of the processing node. Load Balancing AlgorithmAn SLB algorithm consists of the following three parts: Information Policy: sets the load, task volume, and information allocation methods used by the creator of the task plac

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

# cd/usr/local/nginx/sbin/ #/nginx. View Port 1433: #lsof: 1433 Four, test # telnet 10.0.1.201 1433 V. Using the SQL Server Client tool test VI. implementation principle of TCP load Balancingwhen Nginx receives a new client link from the listening port, it immediately executes the routing algorithm, obtains the service IP that specifies the connection required

First, Brief introduction LVS is a shorthand for Linux Virtual server and is a highly scalable and highly available cluster solution on Linux servers. Developed by Dr. Zhangwensong, it is now integrated into the Linux kernel module and implements a load balancing schedule of four layers (transport layer) at the kernel level. Principle:ii. working mode of LVSThere are three different modes of operation dep

determines that the transmission is based not only on the MAC address (the second Layer Bridge) or the source/destination IP address (third-tier routing), but also on the TCP/UDP (layer fourth) application port number. Layer Fourth switching functions are like virtual IP, pointing to the physical server. It transmits a variety of business compliance protocols, with HTTP, FTP, NFS, Telnet, or other protocols. These services require a complex load

Generally, the load balancing method can be classified into two types: static load Balancing algorithm and dynamic load balancing algorithm.

service implementations, we divide load balancing into two types: Client: The client requests a discovery service to get the address (IP, hostname, port). From here, they can choose an address either randomly or round-robin. In order not to extract from the discovery service every time, each client saves some cache, As the discovery service is updated. Cli

large-scale Distributed System (website), large traffic, high concurrency, massive data problems. Therefore, a scale-out approach is required to accommodate the processing power of large Web services by adding machines. For example: A machine can not be satisfied, then add two or more machines, the joint burden of access pressure. This is the typical cluster and load-balancing architecture: Applic

Software load balancing is generally implemented in two ways: software load implementation based on the operating system and software load implementation based on third-party applications. LVS is a kind of soft load based on the Linux operating system. HAProxy is an open-sou

problem of NP-complete is mathematically difficult, it is not a problem in the title, because the NP-complete problem can generally be solved by finding an effective approximate algorithm. 2. Dynamic load Balancing Dynamic load balancing is the goal of

Nginx do reverse proxy, the back-end host has more than one, you can use upstream to define a back-end host pool, in the reverse proxy directly using the host pool name. In upstream, we can define load balancing scheduling algorithm, weight, health status detection and other parameters. For example: Upstream backend { server 172.16.0.1:80 weight=1 max-

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:

Overview Load Balancing is built on the existing network structure, it provides a cheap, effective, and transparent method to expand the bandwidth of network devices and servers, increase throughput, enhance network data processing capabilities, and improve network flexibility and availability.Prerequisites You have installed Apache and can run it. The system used in this article is: centos6.2, Apache: Apac

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

title, because NP completeness problems can generally be solved by a very effective approximate algorithm.2. Dynamic Load BalancingDynamic Load Balancing is the task allocation in the running process of the program to achieve load balan