postgresql load balancing

Understanding of Nginx Load BalancingNginx is a lightweight, high-performance webserver, he can mainly do the following two things:As an HTTP server (as with Apache)Load balancing as a reverse proxy serverNow Nginx everywhere can be seen, often see the page after the outage will show Nginx words, which also shows that nginx because of high performance, use config

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 i

Original http://nginx.org/en/docs/http/load_balancing.html This article is translated according to your own understanding Load Balancing among multiple applications is a commonly used technology to improve resource utilization, increase server throughput, reduce latency, and ensure application fault tolerance. Nginx can serve as an efficient HTTP Load balancer to

,ip6t_reject,nf_conntrack_ipv6,nf_defrag_ipv6 Characteristics of LVS Cluster 3.1 IP load balancing and load scheduling algorithm 1. IP Load Balancing TechnologyLoad balancing technology has a number of implementation scenarios,

greatly affected. Because the picture is on the physical hard disk, access to the picture requires frequent I/O operations, so when the number of concurrent users is more and more, I/O operations will become the overall system performance bottlenecks. This time we will consider the image information distributed storage. Here is an idea for a medium sized business web site for a distributed dynamic storage of picture data and a load-

Reprint http://hi.baidu.com/aking_roc/item/3f62cb0f57b49736a3332a9eLoad balancer devices are also often referred to as "four to seven layer switches", so what is the difference between the four and seven tiers?First, the technical principle of the difference.The so-called four-layer load balancing , that is, mainly through the message of the destination address and port, coupled with the

Session sharingWe are doing site testing, usually need to save some basic user information, such as login will use the session, when the use of Nginx load balancing, when users browse the site will be assigned to a different server, at this time if the session after login on different servers, A remember the user's login status, but the next time the user request was assigned to b what to do? It is not poss

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 back

. 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

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

When developing large network applications, sometimes a server cannot meet the requirements of the client. In this case, you can only add servers to solve the problem, that is, use multiple servers to balance the network load. By using network load balancing, multiple servers are published to the network with one IP address, which is similar to a server, if one o

Load balancing and failover 1, mission objectivesThis task is to solve the server load balancing and failover, this load balancing is to achieve a true sense of load

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

"How the border routers implement Network Load Balancing," we need to understand several relevant knowledge points about NAT, border routers, and Network Load Balancing. The primary purpose of network address translation (NAT) is to resolve IP address shortages, and to achieve TCP

How to use HAProxy to Set up MySQL Load balancing Dec 2, MySQL, Scaling, Server optimization Ubuntu, Debian PreludeHAProxy is an open source software which can load balance HTTP and TCP servers. In the previous article on HAPROXY we configured load balancing for HTTP and in

I. Introduction of LVSLVS 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 that LVS is already part of the Linux standard kernel, the LVS must be recompiled to support the LVS function module before the Linux2.4 kernel is used. However, since the Linux2.4 kernel, the various functions of LVS have been built-in, without any patches to the kernel, which can be directly used by LVs .lv

If there is only one server, this server is dead, so it would be a disaster for the site. Therefore, the load balance at this time will be able to do, it will automatically remove the suspended server. The following is a brief introduction to my experience of using Nginx to do the load Download---Installation Nginx These are not introduced, the previous article has introduced. Windows and Linux under the

.--------------------------------------------------------------------------------------------------------------- ---------|1) Load Balancing　　Boss gave Xiaoming a lot of tasks, Xiao Ming found how to arrange the time also do not finish, so he stared at the side secretly watching the movie, Xiao Qiang suddenly feel behind a coolness, a look back xiaoming a face bad smile looked at him, "These several tasks t

Load balancing is an essential name for any high-availability, high-load system. In a large-scale distributed computing system, a service in a single case, it is difficult to deal with a variety of unexpected situations. Therefore, load balancing is a solution that allows th

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