postgresql load balancing

In 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 servers (databases, caches, and so on) on the server side.I. The role of load

backgroundIn the previous article: Storm's basic framework analysisIt basically explores Storm's: Worker, executor, and other components of the relationship. Threading models and messaging systems. Task assignment process. Topology the process of submission to execution. However, the relationship between Nimbus, supervisor, parallelism, task allocation and load balancing is not cle

PrefaceNginx proxy function and load balancing function is most commonly used, about nginx basic grammar common sense and configuration has been described in the previous article, this article on the point, first describe some of the configuration of the agent function, and then explain the load balancer details.configuration instructions for Nginx Proxy service1

Introduction to load Balancing　　 Perhaps some readers are still unfamiliar with the term load balancing, so let's take a little bit of space to explain what is load balancing.　　 In a large web site, online users can sometimes have

Software load Balancing is generally implemented in two ways: the implementation of soft load based on operating system and the implementation of soft load based on third party application. LVS is a kind of soft load based on Linux operating system, Haproxy is an open source

are many things to do. The Nat mode is simple, that is, to change the IP address and port information to the IP address and port of the real balancing machines, so that the real service machines are hidden behind the Load balancer, the idea is the same as that of normal Nat.[Tunnel mode]: The tunnel mode is to repackage data into a new IP data packet, and then send the data to the virtual Nic by modifying

Practical Load Balancing Technology: website performance optimization strategyOriginal Title: practical load balancing: Ride the performance tiger Author: (English) Peter membrey (Australia) David hows (Dutch) eelco plugge Translator: Wu Haifeng Chen xiaoliang series name: turing Program Design Series Press: People's p

62, Load Balancing cluster introduction, LVS Introduction, LVS scheduling algorithm, LVS NAT mode constructionFirst, load Balancing cluster introductionMain open source software LVs, keepalived, Haproxy, Nginx, etc.The LVS belongs to 4 layer (network OSI 7 layer model), Nginx belongs to 7 layer, Haproxy can be consider

Summary: Consider a situation where a group of machines provide a service that the client accesses each machine at the same opportunity, and when one of the machines is overloaded, reduce access to the server until its load is lowered, and if we add a new server, To balance the client's request to the new machine. Thinking and Analysis: When it comes to load balancin