use of load balancer

I know what server load balancer and high concurrency should be used to solve this problem, but I don't know how to do it even though I have no experience in the concept of server load balancer and high concurrency, I searched for nginx to achieve load balancing and high con

I. Concepts of reverse proxy and Server Load balancer Before understanding the concepts of reverse proxy and Server Load balancer, we must first understand the concept of a cluster. Simply put, a cluster is a server that does the same thing, such as a web cluster, database cluster, and storage cluster, the cluster has

database-based session persistence. To overcome the above problems, you can use the IP address hash-based load balancing solution. In this way, the continuous Web requests of the same client are distributed to the same server for processing. The configuration example is as follows: Http { Upstream sampleapp { Ip_hash; Server >; Server } .... Server { Listen 80; ... Location

0.0 112680 976 pts/0 R+ 18:25 0:00 grep --color=auto keepAlso need to be performed on two RSsh /usr/local/sbin/lvs_dr_rs.sh4. TestingTest Method 1:Enter the VIP in the browser 192.168.242.110 and then deliberately stop an RS nginx service, then refresh the browser to see the results.Test Method 2:In the scheduler, execute the relevant command to view the number of connections:[[emailprotected] ~]# ipvsadm -lnIP Virtual Server version 1.2.1 (size=4096)Prot LocalAddress:Port Scheduler F

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

;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

: This article mainly introduces several methods for nginx server load balancer to process session sharing. For more information about PHP tutorials, see. 1) use cookie instead of sessionBy changing the session into a cookie, you can avoid some drawbacks of the session. in a previously read J2EE book, it also indicates that the session cannot be used in the clust

.png "" 532 "Height =" 242 "/> VCL. Load first6./Default. VCL VCL. Use first6 Then let the client start to initiate a request and give it a try: 650) This. width = 650; "style =" border-bottom: 0px; border-left: 0px; border-top: 0px; border-right: 0px "Title =" image "border =" 0 "alt =" image "src =" http://img1.51cto.com/attachment/201409/25/6249823_1411657818Ub2f.png "" 537 "Height =" 251 "/> web1 ha

/local/nginx/sbin: $PATH------------------------SOURCE!$EffectStart NginxNginx----------------Enter ip\\\\\\\\\\\\\\\\\\\\\\ on the browser and do not conflict with HTTP portAppear"Welcome to nginx! ”Installation SuccessfulWhen you are going to change the configuration fileUpstream App1 {Ip_hash;Server 192.168.1.51:80;Server 192.168.1.52:80;Server 192.168.1.53:80;}server {Listen 80;server_name localhost;#charset Koi8-r;#access_log Logs/host.access.log Main;Location/{Proxy_set_header x-forwarded-

The server Load balancer of the Oracle RAC server distributes new connection requests to the node with the smallest load based on the number of connection loads of each node in the RAC. When the database is running, the PMON process of each node in RAC updates the connection load of each node to service_register every

Example of an nginx load balancer configuration. The configuration examples for load balancing are as follows:Http{upstreamserver{server192.168.10.100:80 weight=3max_fails=3fail_timeout=25s;server 192.168.10.101:80weight=1max_fails=3fail_timeout=25s;server 192.168.10.102:80weight=4max_fails=3fail_timeout=25s; server192.168.10.103:80weight=2max_fails=3fail_timeout

3. Start Stop commandStart:/opt/nginx/sbin/nginxQuick Stop:/opt/nginx/sbin/nginx-s stopComplete ordered stop:/opt/nginx/sbin/nginx-s quitReload:/opt/nginx/sbin/nginx-s ReloadNginx Load Balancer Two,Let's say we have 3 servers and the IP addresses are:192.168.0.1/192.168.0.2/192.168.0.3We use 192.168.0.1 as the front-end primary server, 192.168.0.2 and

Microsoft Azure's Load balancer is a Layer-4 load balancer. The Microsoft Azure load balancer distributes the load between a set of available servers (virtual machines) by calculating t

First, load Balancing introduction Main open source software LVs, keepalived, Haproxy, Nginx and so on; The LVS belongs to 4 layer (network OSI 7 layer model), Nginx belongs to 7 layer, Haproxy can be considered as 4 layer, can be used as 7 layer; Keepalived load balancing function is in fact LVS; LVS This 4-layer load

Lvs-nat model: Similar to Dnat, but supports multi-target forwarding, which is multi-objective DnatIt is forwarded by modifying the destination address of the request message to a certain RS rip selected by the scheduling algorithm.Architectural Features:(1) RS should use a private address, that is, RIP should be a private address, each RS gateway must point to the dip(2) The request message and the response message are forwarded through the Director;

Apache Load BalancerApache can also achieve load balancing. The load balancing of Apache is mainly mod_proxy_balancer achieved by implementation. So, what is the configuration method for Apache load Balancing?In the Apache configuration file, httpd.conf addProxyPass / balancer