firewall load balancing

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

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

Build an LVS load balancing test environment There are many ways to achieve Server Load balancer: local tyrants directly F5, the best performance, the most expensive If you have no money, you can use Apache. Nginx works on the fourth layer of the network. Although its performance is normal, it is flexible. For example, you can map port 80 to port 8080 of The Real

medium and large projects will take into account the distribution, the previous several articles focused on the technical cluster of data processing. Let's look at the load balancing –nginx for servers today. He can also decide to place the request on that service, in addition to the static resource processing. installation of Nginx Point I download the download well, we can directly click to open the serv

CentOS Apache-based Tomcat load balancing and clustering First, the background principle1, Tomcat to do a Web server has its limitations, low processing power, low efficiency. withstands concurrency Small (around 1000). However, there are many websites or pages that are JSP. And the use of Tomcat as the web, so only on this basis to increase the optimization.2, the current approach is the Apache + MOD_JK +

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

. Mode=0 (BALANCE-RR) (Balanced rotation strategy)Link load balancing increases bandwidth, supports fault tolerance, and a link failure automatically switches the normal link. The switch needs to configure the aggregation port, Cisco is called the Port channel.Features: Transmission packet sequence is transmitted sequentially (that is: the 1th packet to go eth0, the next package will go eth1 ...). This mode

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

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

three Alteon servers were used.(2) software:Apache is a well-known HTTP server. Its Two-way proxy/reverse proxy function can also achieve the HTTP load balancing function, but its efficiency is not very good. The other haproxy is purely used to handle Server Load balancer and has a simple cache function.In terms of the built-in Server

Document directory IGMP multicast (IGMP Multicast) Refer: http://blog.csdn.net/ghj1976/archive/2009/03/17/3997840.aspx Recently, we are studying how to achieve Load Balancing (NLB) for csdn Forum Web servers ). Below is my documents: How NLB works Features of the NLB algorithm: In the NLB cluster, each server has its own static IP address, and all servers in the NLB Cluster also have a common IP a

The pros and cons of load balancing strategies and their ease of implementation have two key factors:(1) Load Balancing algorithm(2) The detection mode and ability of network system condition1. round robin (Round Robin): Every request from the network is assigned to an internal server in turn, starting from 1 to N an

the difference between one or four layer and seven layer load balancing Seven-tier load balancing is based on HTTP protocol, and is suitable for load balancing of Web server. (Nginx) The four-layer

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

"Php_value Session.save_path "tcp://ip:11211"2. In one application:Ini_set ("Session.save_handler", "memcache");Ini_set ("Session.save_path", "tcp://ip:11211");Also be sure to comment out the following; Session.save_path= "/var/lib/php/session"and open the extension=memcache.so.Reboot Apache, check the phpinfo "registered save handlers" will have "files Usermemcache" These 3 available, if there is proof installedmemcached Server execution and results[Email protected] ~]# memcached-tool127.0.0.1:

thousands of IOPS capacity, the single-machine IO capability has exceeded the traditional disk storage. However, what has been bothering us is how to solve the high availability of Oracle databases in a shared-free storage environment? Our team has designed a framework that provides simple, reliable, and highly available functionality.While in Oracle's position it is always advisable for customers to be better able to plan their own applications, when there are other

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