dns round robin load balancing

Linux: Round Robin algorithm, Active-Backup algorithm, MAC address XOR algorithm (MAC-XOR ). The following is a simple analysis of the three main algorithms. 3.2.1 Rotation Algorithm The algorithm is based on the principles of fairness. It selects the sending interface for each data packet to be sent. The main idea of the algorithm is that the first data packet is sent by one interface, another data packet is sent by another interface, and the follow

theHTTPdefined, and by theHTTPAgents andWebThe server is implemented together. Very simple, whenHTTPagents (such as browsers) toWebThe server requests aURLafter theWebServer can passHTTPin the response header information Locationtag to return a newURL, which meansHTTPthe agent needs to continue to request this newURL, this completes the automatic jump. Of course, if you write yourself aHTTPProxy, nor can it support redirection, which isWebreturned by the server LocationMark to turn a blind eye,

Nginx/lvs/haproxy is currently the most widely used three load balancing software, I have been implemented in a number of projects, reference to some information, combined with some of their own experience, summed up.The general use of load balancing is to use different technologies depending on the stage of the site's

several common scheduling algorithms for load Balancing clusters(1) Polling (Round Robin): The access requests are assigned in sequence to each node in the cluster (real server), equal to each server, regardless of the actual number of connections and system load of the server(2) Weighted polling (Weighted Round

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

http://virtualadc.blog.51cto.com/3027116/875622ObjectiveWith the continuous development of Web applications, customers also put forward higher requirements for the stability and reliability of the business, which is no longer limited to the server virtualization within IDC. Many people know that the effect of data exchange between the major domestic operators is not satisfactory, and as a user, especially the business users who require timely response, on the one hand to consider the data disast

it is mapped by default without any matching conditionsBackend app # define a backend part named appBalance roundrobinServer app1 192.168.3.128: 80 checkServer app2 192.168.3.129: 80 checkStats enable # enable the server status monitoring page After the configuration is complete, restart haproxy. Service haproxy restart 4. Test [Root @ usvr-124 haproxy] # curl 192.168.3.124/1.html Hello, 192.168.3.129 [Root @ usvr-124 haproxy] # curl 192.168.3.124/1.html Hello, 192.168.3.128 From this we can se

Transferred from: https://www.cnblogs.com/xrq730/p/5154340.htmlWhat is load balancingLoad balancing, the English name is load Balance, refers to the multiple servers in a symmetric way to form a collection of servers, each server has an equivalent status, can be provided separately from external services without the assistance of other servers. With a

LVS Reference: http://zh.linuxvirtualserver.org/ Several terms:Director: Also known as scheduler, LVS front-end device; RealServer: a real internal server is actually providing services; VIP: The public IP address, that is, the IP Address requested by the customer; Dip: the address for communication between the scheduler and the RealServer;LVS has three working modes: LVS implements Server Cluster load balancing