cloud load balancer

For stress testing, the middleware uses WebLogic 816The database version is 11.1.0.6 RAC.The stress testing tool is LoadRunner 8.0. Test a single instance and RacThe load of each node in the environment. In WebLogicA multi-pool is configured on, and WebLogicThe server Load balancer policy is provided to separate the Concurrent Server

Heartbeat + LVS build a high-availability server Load balancer Cluster 1. Introduction to heartbeat: The Heartbeat project is an integral part of the Linux-HA project, which implements a high-availability cluster system. Heartbeat service and cluster communication are two key components of a highly available cluster. In the heartbeat project, the Heartbeat module implements these two functions. This cluster

Oracle RAC provides two methods to achieve load balancing. The first is pure technical means, that is, when a user connects, the node that determines based on the current load of the system to process user requests; the second type is business-oriented. Applications are divided into many services manually, and connection requests from a service are processed by a node.Let's take a look at these two methods:

synchronization strategy according to the type of SQL statement to ensure the minimization of the data synchronization cost. 3. Advantages and Disadvantages Advantages:(1) Strong extensibility: When the system to higher database processing speed, as long as simply increase the database server can be extended.(2) Maintainability: When a node fails, the system will automatically detect the failure and transfer the application of the fault node to ensure the continuous work of the database.(3) Sec

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

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 address (VIP), and then add a four-tier port n

Nginx Server Load balancer is an amazing technology that many people cannot master. Here we will introduce the problems related to nginx Server Load balancer in detail. I tried nginx Load Balancing today! What is nginx? Nginx ("engine X") is a high-performance HTTP and rever

: This article mainly introduces the nginx server load balancer configuration. if you are interested in the PHP Tutorial, refer to it. Common load balancing solutions include the following: 1. Round Robin Round Robin (Round Robin) distributes client Web requests to different backend servers in sequence based on the order in the Nginx configuration file. The confi

port 80.The nginx download address is as follows:Nginx download: http://nginx.net/Download the version used in this test: nginx/Windows-0.8.22 Download and decompress the package to C:, and change the directory name to nginx. Practice steps: First: On the local server (10.60.44.126), create a website using the port 808, for example: IIS website binding settings Second: Create a website in the Remote IIS 10.60.44.127 using the port 808, for example: Remote IIS binding settings Note: The first

Haproxy + Apache for Linux Server Load balancer Software Haproxy provides high availability, Server Load balancer, and reverse proxy Based on TCP and HTTP applications, especially for websites with extremely high loads that usually require session persistence or layer-7 processing. Haproxy runs on the current hardware

;Create mod. conf in the/usr/local/apache/conf/directory:LoadModule jk_module modules/mod_jk-1.2.31-httpd-2.2.x.soJkWorkersFile conf/workers. properties# JkMount/*. jsp lbcontroller# JkMount/*. do lbcontrollerJkMount/* lbcontroller # you can configure multiple apache distributors as needed./* indicates that apache distributes all files by lbcontroller. You can set it by yourself *. jsp ,*. do and so on2.2 workers. properties fileCreate the workers. properties file in the conf directory under apa

I. Introduction to the Basic overviewIi. types and principles of LVSThree, LVS scheduling algorithmIv. using DR and Nat to achieve web load balancingI. Introduction to the Basic overviewLVS is a load balancing software that works at the transport level and consists of two components of the IPVSADM and kernel space of the user space Ipvs. The Ipvsadm is a command-line tool for user space, primarily for manag

ngx_posted_accept_events queue can be processed first. After processing, the ngx_accept_mutex lock will be released, and then the time in the ngx_posted_events, this greatly reduces the time occupied by the ngx_accept_mutex lock. Server Load balancer When establishing a connection, when multiple sub-processes compete for a new connection time, only one worker sub-process will eventually connect the resume,

: % 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

Web server.(2) The Load Balancer (control side) failure can cause the entire database system to be paralyzed.Third, database split (distributed)By a certain condition, the data stored in the same database is distributed to multiple databases, distributed storage, routing rules to access a specific database, so that each access is not a single server, but the n server, which can reduce the

;; *) Echo "Usage: $ start|stop}" ;; Esac 2.1.3 LVS Process Monitoring Recovery script#!/bin/bashrs_1=192.168.136.129rs_2=192.168.136.130vip=192.168.136.127. /etc/init.d/functionsWeb_result () {rs=curl -I -s $1 |awk ‘NR==1 {print $2}‘Return $rs}Lvs_result () {rs=ipvsadm -ln |grep $1:80 |wc -lReturn $rs}Auto_lvs () {Web_result $A=$?Lvs_result $B=$?If [$a-ne] [$b-ge 1]ThenIpvsadm-d-T $VIP: 80-r $Action "Kill"/bin/trueFiIf [$a-eq] [$b-lt 1]ThenIpvsadm-a-T $VIP: 80-r $1-g-W 1Action "add $"/bin

Article Title: about dual-connection server load balancer. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Save everyone's time. First, let's talk about the theme: 　　 Packet-level TCP/UDP load balancing and NAT (Network Addres

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