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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 algorithm, integrated in the framework.Ngx_http_upstream_ip_hash_module,ip Hash, which preserves the session.Ngx_http_upstream_least_conn_module, th

Nginx reverse proxy for load Balancing configuration diagram[Introduction] Load Balancing configuration is a very large machine needs to consider some of the problems, but also a data security approach, let me introduce the reverse proxy load Balancer configuration diagram in Nginx, you can refer to this article to operate. First, the following nginx is introduced as a reverse proxy to achieve load

Load Balancing cluster (LB)How load Balancing clusters workWhen a user sends a request, the request is not immediately sent to the backend's real server (realservers), but is sent first to the Scheduler or Distributor (Director), and then the director, based on some scheduling algorithm, The request is sent to the backend real server (realservers). After the server processes the request, it responds directl

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 primary server, immediately switch to the backup server, to improve the overall system can The first time I saw this head

. Apache can have a good static page processing capabilities, if paired with Tomcat can support both static and dynamic pages 2. Tomcat can assume low performance requirements for Web applications. Load Balancing In order to improve the usability and performance of the whole system, load balancing is often used, while Apache and Tomcat are often combined to achieve load

reproduced from this blog: http://blog.csdn.net/u014649204/article/details/25115039the design of the balance algorithm directly determines the cluster in Load Balancing performance, poorly designed algorithms can lead to unbalanced load on the cluster. The main task of the general balancing algorithm is to decide how to select the next cluster node. The new service request is then forwarded to it. Some simp

As developers of back-end applications, we often develop, debug, test and publish our applications to the production environment, and users have direct access to our applications. But for Internet applications, there is a low profile or thick or thin layer of load balancing software between your application and users, and they do not show the dew silently playing an important role, so much so that we often neglect their existence. Because the load bal

NAT and ipsec vpn of link Balancing Devices (1) when implementing a new link Load Balancing Project, the user's previous egress devices are usually firewalls, if the organizational structure of a user is distributed, it is often necessary to build a security tunnel to communicate with the headquarters or branches over the internet through the ipsec vpn. In this case, the firewall is used as an egress device

Nginx load Balancing 1, Nginx load Balancing overviewWith the explosive growth of Internet information, load balancing (load balance) is no longer a very unfamiliar topic, as the name implies, load balancing is to distribute load to different service units, not only to ensure the availability of services, but also ensu

According to the online article collation.Load balancer software LVs (Linux Virtual Server) concept paperLVS is based on the Linux operating system to establish a virtual server, to achieve the load balance between service nodes. It is implemented based on the Linux kernel. The 2.6.X kernel is integrated with the LVS module by default.The implementation of common load balancing for LVS is based on IP protocol, so it is generally called Ipvs.Ipvs is es

The commercial license version of Nginx Plus is beginning to feature TCP load balancing. Starting with Nginx version 1.7.7, it is now a commercial fee version that you want to try and apply on the website. In other words, nginx in addition to the usual HTTP load balancing, Nginx increases the implementation of TCP protocol based load balancing method. HTTP load

This article is the first article on load Balancing, which describes IP load balancing, link-layer load balancing, and hybrid p-load balancing. Part of the content is excerpted from reading notes.1.3 IP Load BalancingThe network layer is load balanced by modifying the request destination address.After the user requests

From: http://hi.baidu.com/_kouu/item/479891211a84e3c9a5275ad9 In an SMP (symmetric multi-processor) Environment, each CPU corresponds to a run_queue (executable Queue ). If a process is in the task_running state (executable State), it will be added to one of the run_queue (and will only be added to one run_queue at the same time ), so that the scheduler can schedule it to run on the CPU corresponding to run_queue.A cpu corresponds to a run_queue design, which has the following advantages:1. A pr

LVS + Keepalived implements load balancing and lvskeepalived Lvs is an open-source project launched by Dr. Zhang Wenyu of the National Defense University to achieve load balancing between servers. Full name: linux virtual server With the expansion of enterprises, the access to servers is growing. At this time, there are only two solutions for server load capabilities. 1: Expand the server's hardware config