postgresql load balancing

Load Balancing with HaproxyFirst, the conceptHaproxy is a free and open source software written in the C language [1] that provides high availability, load balancing, and application proxies based on TCP and HTTP.Haproxy is especially useful for Web sites that are heavily loaded, and often require session-hold or seven

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

Load Balancing cluster is currently the most used cluster type, through the primary node load scheduler (Director), using a specific shunt algorithm, the access requests from the client to a number of server nodes to work together to alleviate the overall system load pressure, response to more requests; cluster

There are several ways to load balance:one, based on the client way:Each client program has a certain knowledge of the server cluster, which in turn sends requests to different servers in a load-balanced manner. This approach is primitive, and now some older systems are still using this approach, and the client simply uses polling to achieve load

Azure Load Balancing Load Balancing Overview: Microsoft Azure provides load balancing services for virtual machines (IAAS) and cloud services (PAAs) hosted in it. Server Load balancer s

Preface:At present, many Web applications, or Web interfaces, will be at the entrance of the server, using a server container to listen to the port, and then make request forwarding, such as Nginx Apache. Server containers are critical to the entire Web service, including the ability to manage service processes, perform proxies, pre-process requests, and load balance. The focus of today's discussion is to make more meaningful

Recent projects have encountered a firewall load balancing needs, take out and discuss with you. Users in the project procurement of 4 domestic well-known brands of high-end firewall, originally intended to use the firewall itself cluster way to achieve the firewall load sharing and redundant deployment, but the firewall manufacturer's reply is if the cluster ap

as the current host information.Referer is set by the Referer property.Transfer-encoding is set by the TransferEncoding property (the SendChunked property must be true).User-agent is set by the UserAgent property. asp.net how does C # do distributed load Balancing? Specific ideas? Last year for a customer based on nginx load

The basic algorithms for load balancing are as follows (refer to F5 products): Random: Load Balancing method randomly distributes the load to each available server, selects a server by the random number generation algorithm, and sends the connection to it. While many o

properties. The contents of the document are as follows: [Root@node1 bin]# Vim/etc/httpd/extra/workers.properties Worker.list = TOMCAT1,STAT1 Worker.tomcat1.type = ajp13 Worker.tomcat1.host = 192.168.0.1 Worker.tomcat1.port = 8009 Worker.tomcat1.lbfactor=1 Worker.stat1.type = Status Restart the HTTPD service and test [Root@node1 bin]# Service httpd restart The test page is as follows With the above configuration and testing, now that Apache is implemented based on Mod

There are many ways to load balance the web, and here are a few common load-balancing methods. 1. User manual Selection method This is an older way. Load balancing is achieved by providing different lines and different server connections in the main home portal. This approac

Session retention is one of the most common problems in load balancing and is a relatively complex issue.Session hold is sometimes called sticky session (Sticky Sessions).Before we introduce session-keeping techniques, we have to take some time to figure out the concepts: what is a connection (Connection), what is a session, and the difference between the two. In particular, if we are just talking about

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 swi

LVS Load BalancingRecently in the study server load Balancing, read some information on the Internet, found that the main software load Balancing scheme has nginx (load balancing for HT

http://blog.csdn.net/qq_28602957/article/details/61615876 What is load balancing The greater the amount of traffic that a server has in a unit of time, the greater the pressure on the server, and the greater the server's ability to withstand, the more it crashes. In order to avoid server crashes and give users a better experience, we share the server pressure in a load