front end load balancer

Defined:LVS is a shorthand for Linux virtual server, that is, a virtualized server cluster system.Structure:In general, the LVS cluster uses a three-tier structure, the main component of which is: A, Load Scheduler (load balancer), it is the entire cluster to the outside of the front-

resources, etc., structure such as:However, if in a situation of ultra-large traffic, the front end as the sender of the request, fully capable of the issuing phase of the request to the different load server, and then through the NGX two times load balancing, the structure is as follows:Global configuration://

---Edit the configuration file----Vi/etc/exports/usr/share * (Ro,sync)/opt/benet 192.168.100.0/24 (Rw,sync)/OPT/ACCP 192.168.100.0/24 (Rw,sync)Exportfs-rv---client view, mount----SHOWMOUNT-E 192.168.100.103Mount.nfs 192.168.100.103:/opt/benet/var/www/htmlMount.nfs 192.168.100.103:/opt/accp/var/www/htmlSecond, install HTTPD Linux on the resource server six or seven randomProvide a service, not repeatThird, install IPVSADM on the dispatch serverRpm-q ipvsadm//Check Ipvsadm bagYum install IPVSADM//

information becomes as follows: ldirectord|32454] quiescent Real server:192.168.60.132:80 (192.168.60.200:80) (Weight set to 0) This log output is to set the weight of the failed node 192.168.60.132 to 0 without removing the host from the LVS routing table, at which point the connected client will become unreachable, but the new connection will not be assigned to this node. If you restart the real Server1 service, Ldirectord will be able to automatically detect that the node has been activat

for failure and then shuts down the connection service for this node.Now restart the service that starts the real Server1 node, and then observe the log output of the Pluse service:Nov 16:49:41 LVs nanny[7158]: making 192.168.60.132:80 availableThe nanny daemon automatically detects that the real Server1 service has been activated and re-makes the node available for connection within the set detection time.This article is from the "Technical Achievement Dream" blog, please be sure to keep this

the client to the server, the client is the "Source" and the server is the "target". If the datagram is sent from the server to the client, the server is the "Source" and the client is the "target ". Everything is based on the inbound and outbound data packets. To sum up, the "Source" refers to the data outflow end and the "target" refers to the end to which the datagram is sent. Understanding this is one

give the sister to tell a why, the last dead or you.Cause a lot of slow loading, but you just need to know some of it, I will give you some common problems and identification methods, if these are not, then you can only wish you good luck buddy.1.problems at the back endSee no, the first request is particularly long, especially long, and is clearly more discordant than the other requests. General Web page The first request is the probability of a dynamic request is relatively large, if the requ

Server Load balancer principles and practices part 3 basic concepts of Server Load balancer-network Basics SeriesArticle: Server Load balancer: requirements of Server Load