round robin load balancing f5

the hosts on the server cluster, so that they are responsible for processing these requests and giving them, and the process of allocating requests is generally the kind of round-robin request pictured above, and of course there is an address translation technology that becomes NAT technology (also called Do network address translation technology is to request the address from the routing address to the cluster server in the IP address of a server, w

Common open source software for load balancing: Nginx, LVS, keepalived Commercial hardware load devices: F5, Netscale 1. LB, LVs introduction lb cluster is a shorthand for load balance clusters, translated into Chinese is load bal

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

The load master can provide many kinds of load balancing methods, that is, we often call the scheduling method or algorithm:Round robin (Round Robin)This method loops the received requests to each machine in the server cluster, which is the active server. If this is the case

of the application itself. Stability is an effective measure of many factors affecting system performance, including the maximum number of users that can be supported by the cluster system and the time required to process a request. Among the many existing methods of balancing server load, the following two methods are widely studied and used: DNS Load

-HashKeyword. Each internal address is always converted to the same conversion address. Inbound Server Load balancer The address pool can also be used to achieve Load Balancing for inbound connections. For example, the inbound web server connection can be allocated to a group of servers: web_servers = "{ 10.0.0.10, 10.0.0.11, 10.0.0.13 }"rdr on $ext_if proto tc

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

protocols, such as the Outlook Web App. So on the load balancer this layer, no longer special need for the load office weighing products to support client affinity.Let me say a few more words, from the level of the mailbox connection to the level of the Web connection request. As mentioned earlier, older versions of Exchange have problems requiring clients to re-authenticate without client affinity support

server during the same session, and implement session stickiness.Disadvantage: The session is lost after the target server is down;3.5 weightingOn the basis of polling, random, least-link, Hash ' Algorithms, the load server is allocated by weighting the way.Advantages: According to the weight, the number of requests to adjust the forwarding server;Cons: use is relatively complex;Four, hardware load balanci

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

One of Linux load Balancing software LVS (concept article) A brief introduction of LVSLVS is the short name of Linux virtual server, the Linux VM, a free software project initiated by Dr. Zhangwensong, and its official site is www.linuxvirtualserver.org. Now that LVS is already part of the Linux standard kernel, Before the Linux2.4 kernel, the use of LVS must be recompiled to support the LVS function module

bandwidth consumption of single NIC, competitive network adapter and other shortcomings still exist. In addition, some routers (especially Cisco products) do not support the automatic creation of unicast IP addresses and multicast mac ARP mappings, which require manual configuration. IGMP multicast (which can only be selected when multicast is selected), in addition to inheriting the benefits of multicasting, NLB sends an IGMP message every 60 seconds, allowing multicast packets to be sent onl

bandwidth consumption of single NIC, competitive network adapter and other shortcomings still exist. In addition, some routers (especially Cisco products) do not support the automatic creation of unicast IP addresses and multicast mac ARP mappings, which require manual configuration. IGMP multicast (which can only be selected when multicast is selected), in addition to inheriting the benefits of multicasting, NLB sends an IGMP message every 60 seconds, allowing multicast packets to be sent onl

consumption of single NIC, competitive network adapter and other shortcomings still exist. In addition, some routers (especially Cisco products) do not support the automatic creation of unicast IP addresses and multicast mac ARP mappings, which require manual configuration. IGMP multicast (which can only be selected when multicast is selected), in addition to inheriting the benefits of multicasting, NLB sends an IGMP message every 60 seconds, allowing multicast packets to be sent only to this c

Citrix NetScaler Load Balancing algorithmhttp://blog.51cto.com/caojin/1926308As we all know, Citrix NetScaler, which delivers products as a new generation of applications, has the industry's leading data control, application delivery capabilities, but as one of the fundamental content of ADC capabilities, it is not possible to adapt to so many scenarios without a robust, diversified equalization algorithm I

{@Autowiredprivate testregistryservice testregistryservice; @RequestMapping ( "/hello") public String Index (model model) { string Name=testregistryservice.hello ("zz"); System.out.println ("xx==" +name); return "";}}(3) The address we are referring to, the code is as follows: DescriptionDescriptions of some of the properties of Dubbo:reference:1) interface invocation of the service interface2) Check startup checks if provider is present, true error, false ignore3) Registry Register for

{@Autowiredprivate testregistryservice testregistryservice; @RequestMapping ( "/hello") public String Index (model model) { string Name=testregistryservice.hello ("zz"); System.out.println ("xx==" +name); return "";}}(3) The address we are referring to, the code is as follows: DescriptionDescriptions of some of the properties of Dubbo:reference:1) interface invocation of the service interface2) Check startup checks if provider is present, true error, false ignore3) Registry Register for

{@Autowiredprivate testregistryservice testregistryservice; @RequestMapping ( "/hello") public String Index (model model) { string Name=testregistryservice.hello ("zz"); System.out.println ("xx==" +name); return "";}}(3) The address we are referring to, the code is as follows: DescriptionDescriptions of some of the properties of Dubbo:reference:1) interface invocation of the service interface2) Check startup checks if provider is present, true error, false ignore3) Registry Register for

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

The pros and cons of load balancing strategies and their ease of implementation have two key factors:(1) Load Balancing algorithm(2) The detection mode and ability of network system condition1. round robin (Round Robin): Every r