l4 switch load balancing

working together to perform an application.clusters can be divided into the following types(1) High reliability (HA). With cluster management software, when the primary server fails, the backup server can proactively take over the work of the primary server and switch the past in time. To achieve uninterrupted service to users.(2) High Performance Computing (HP).That is to make full use of the resources of each computer in the cluster to realize the

backbone network from conventional third layer to comprehensive third-layer, fourth-layer switching function, its unique WAN integration capability and the access control based on layer fourth exchange have played a key role in secure and orderly network data transmission. In addition, Cabletron SmartSwitch router provides different levels of prioritization for specific business application data exchange based on the QoS features of layer fourth switching. 　　3 Implementing server

represents the LVs (Linux Virtual Server). 3. Software seven layer load balancer is based on HTTP reverse proxy, the Representative has Nginx4. Multi-line multi-region intelligent DNS resolution and hybrid load balancing approach Sina home page For example, load balancing u

Source: Network Collection In general, load balancing is the client's request to the backend of the various real servers to achieve load balancing purposes. There is another way is to use two servers, one as the primary server (master), the other as a hot Standby, the request is all to the primary server, when the pr

original destination address is VIP,The server finds that the VIP address is configured on the local IP tunneling device. Therefore, the server processes the request and then directly returns the response packet to the customer based on the route table. Direct routing virtual host virtual server via direct routing (Vs/DR) This IP layer load balancing method is similar to that in IBM's netdispatcher. Both t

(layer-3 service application) (software and code layer ):Http://msdn.microsoft.com/zh-cn/library/ms978689.aspxTiered distribution (hierarchical distribution ):Http://msdn.microsoft.com/en-gb/library/ms978701 (En-CN). aspxDeployment patterns:Http://msdn.microsoft.com/zh-cn/library/ms998478.aspxHttp://msdn.microsoft.com/en-us/library/ms998478.aspx-----------------------------------------------------2. Load Balance)Server

It is best to divide the routing load balancing network segments. This will not disrupt the routing behavior at the network layer, because the host or router forwards each packet through the "Route" found in the route table, unless the load balancing of the route table is achieved, otherwise, only a unique route is sel

resources, etc., structure such as:However, if in a situation of ultra-large traffic, the front end as the sender of the request, fully capable of the issuing phase of the request to the different load server, and then through the NGX two times load balancing, the structure is as follows:Global configuration:// Load

1. Overview The interaction between the DHCP Client and the DHCP Server involves both broadcast packets and unicast packets (used during renewal, we know that the general Server Load balancer equipment implements Load Balancing for unicast packet data, so the pure DHCP Client-> DHCP Server architecture basically cannot achieve

MSTP addressing link load balancing and link detection topologiesFigure 11 topology shown, there are two links between the huiju switch and the Jieru switch, Huiju G0/0/1 Gigabit Port, G0/0/2 Gigabit Port, Jieru G0/0/1 Gigabit Optical port, E0/0/2 hundred Gigabit Electric port, Link1 is bare fiber, LINK2 Link uses tran

. When the machine has just started, "Hot data cache" is not actually established, this time the outbreak of a large number of requests, it is likely to cause the machine can not "bear" and hang up again. In MySQL for example, our MySQL query, usually more than 95% are in the memory cache, the actual execution of the query is not much. In fact, whether it is a single machine or a cluster, in high concurrent request scenario, restart or switch, there i

module at startup. the external virtual network interface device is bond0. Add the following two lines: alias bond0 bonding Options bond0 mode = 0 miimon = 250 use_carrier = 1 updelay = 500 downdelay = 500 Note: miimon is used for link monitoring. For example: miimon = 100, the system monitors the link connection status every MS. If one line fails, it is transferred to another line. The value of mode indicates the working mode, which has a total, 2, 3 and other four modes, commonly used for 0,

Original: http://blog.hesey.net/2013/02/introduce-to-load-balance-and-lvs-briefly.htmlIn large-scale Internet applications, load balancing devices are an essential node, originating from high concurrency and large traffic impact pressures in Internet applications, where we typically deploy multiple stateless application servers and several stateful storage server

1 Initial knowledge Lvs:linux Virtual Server 1.1 LVs is whatLVS is the short name of Linux virtual server, which is a free software project initiated by Dr. Zhangwensong, and its official site is www.linuxvirtualserver.org. Now LVS is already part of the Linux standard kernel, Prior to the Linux2.4 kernel, the LVS had to be recompiled to support the LVS function module, but since the Linux2.4 kernel, the various functions of LVS have been built-in, without any patching of the kernel, and the fun

The first time I saw this headline I was surprised that Apache can still do load balancing? It's so powerful. After a survey found that it can, and the function is not bad. This is thanks to the Mod_proxy module. Is worthy of the mighty Apache AH. Less nonsense, the following is to explain the load balancing method of

equipment channels to balance the flow of traffic sharing. It is like a temple to pick 10 barrels of water a day, one still has to walk 10 times, but at the same time assign 10 monks but only one trip to complete the work of the same reason. Load Balancing can work at the same time with a number of network devices to speed up the processing of network information, and then optimize the performance of netwo

There are many solutions, such as using Windows2000 or WindowsServer2003 to provide Network Load balancing services, but the settings for this service are complex. And it is a simple method to realize Network Load Balancing through DNS server. The author takes the Web server in the enterprise network as an example to

! We use Lvs+keepalived's architecture based on full open source software to provide you with a load-balanced and highly available server.lvs+keepalived IntroductionLvsLVS is a short version of Linux virtual Server, which means the Linux VM, is a virtual server cluster system. Founded in May 1998 by Dr. Zhangwensong, this project is one of the earliest free software projects in China. There are currently three IP