use of load balancer

In "high concurrency, massive data, distributed, nosql, cloud computing ...... I believe many of my friends have heard of and even often talked about "clusters and Server Load balancer". But not all of them have the opportunity to really come into use these technologies, not everyone really understands these technical terms. The following is a brief explanation.

Zhang Hua posted: 2015-11-13Copyright notice: Can be reproduced arbitrarily, please be sure to use hyperlinks in the form of the original source of the article and the author's information and this copyright notice(http://blog.csdn.net/quqi99) Four-tier load balancing is to determine which traffic needs to be load balanced by publishing a three-tier IP a

I. LVS principles 1. The full name of LVS is Linux Virtual Server, that is, Linux Virtual Server. It is an open-source project of Dr. Zhang Wenyu from our country. In linux memory 2.6, it has become a part of the kernel. in earlier versions, the kernel needs to be re-compiled ., LVS is mainly used for multi-server load balancing. It works at the network layer to implement high-performance and high-availability server cluster technology. It is cheap an

Principle and Implementation of Spring Cloud server Load balancer Ribbon Ribbon Introduction In a distributed system, multiple instances are deployed for each microservice. How to evenly distribute service consumers to multiple service provider instances requires the use of Server Load

[[email protected] ~]# lsmod |grep IPIp_vs 140944 02.4.2 Source Installation Installation dependenciesYum install popt-static popt-devel kernel-devel kernel libnl-devel libnl3-devel installing kernel modulesLn-s/usr/src/kernels/2.6.*/usr/src/linux Download LVS required software ipvsadm-1.2.6.tar.gz software, compile and install:Wget-c http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.26.tar.gzTar xzvf ipvsadm-1.26.tar.gz cd ipvsadm-1.26 make make install ./confi

1. Install JDK properly under liunx. Not tired 2. Configure the server Load balancer server apache2.2.101. Download apache2.2.10 and install related components.Http://www.sunfreeware.com/indexintel10.htmldownload httpd-2.2.10.tar.gzInstallation Method:Decompression: tar-zxvf httpd-2.2.10.tar.gz . /Configure -- prefix =/usr/local/apache2 -- enable-auth-Anon -- enable-auth-dBm -- enable-Cache -- enable-disk-

: % M: % S % Y]"# JkMount/*. * controller7./Etc/httpd/conf/Create and configure the workers. properties fileWorker. list = controller, statusWorker. tomcat129.port = 8009Worker. tomcat129.host = 192.168.152.129Worker. tomcat129.type = ajp13Worker. tomcat129.lbfactor = 1Worker. tomcat130.port = 8009Worker. tomcat130.host = 192.168.152.130Worker. tomcat130.type = ajp13Worker. tomcat130.lbfactor = 1Worker. controller. type = lbWorker. controller. balance_workers = tomcat129, tomcat130Worker. c

ipvsadm start ipvsadm -C #清除内核虚拟服务器表中的所有记录 ipvsadm -A -t 12.0.0.1:80 -s rr #创建虚拟服务器 ipvsadm -a -t 12.0.0.1:80 -r 192.168.10.51:80 -m ipvsadm -a -t 12.0.0.1:80 -r 192.168.10.52:80 -m ipvsadm Options for the IPVSADM management tool use: -A: Indicates adding a virtual server -T: Used to specify the VIP address and TCP port -S: Used to specify load balancing scheduling algo

:/** * Annotation to mark a resttemplate beans to being configured to use a loadbalancerclient * @author Spencer Gibb */@Target ({Elementtype.field, elementtype.parameter, Elementtype.method}) @Retention (retentionpolicy.runtime) @ Documented@inherited@qualifierpublic @interface loadbalanced {}From its definition note for this annotation, we know that this annotation is used to mark Resttemplate to use a

packets from if1 will be handled by example and all will be discarded. Fortunately, local host 1 will re-transmit these discarded packets, and there will always be a chance to get them to if2, so the link can be barely maintained, but it is slow. of course, in some extreme circumstances, it may also be interrupted midway through. 　　 Therefore, if equalize server load balancer and NAT work together, the con

first Prepare 3 machines (VM VMS, of course), one to do load balancer server, 2 Web services, respectively installed Nginx, how to install nginx here is not in the narrative. In addition, in order to test the smooth, please turn off the firewall of 3 machines first. IP Planning:equalization Machine: 10.1.1.10 | web-1:10.1.1.11 | web-2:10.1.1.12 The following configurations are made in nginx.conf

nginx+tomcat+memcached Load Balancer Configuration complete process:Objective:Nginx realizes The load balance of Tomcat and uses memcached to realize session sharing. Configure TOMCAT,JDK First Put jdk,Tomcat into the site /opt directoryInstalling the JDKCd/optchmod 755 jdk-6u45-linux-x64-rpm.bin./jdk-6u45-linux-x64-rpm.binjava-version//Inspection

This article tries to explain the operation steps and simple configuration of using keepalived + Nginx + Tomcat to build a high-availability load balancing environment in Ubuntu Server environment, which does not involve performance tuning. Let's talk about their respective roles: tomcat– Application Server nginx– reverse proxy server, as a load balancer