load balancing web services

http://172.16.10.30/test.html, you can use tail-f/var/log/haproxy/haproxy-info.log to instantly view the Haproxy access request log.[[emailprotected] ~]# tail -f /var/log/haproxy/haproxy-info.log Jun 30 21:20:48 localhost haproxy[4202]: 172.16.10.8:50352 [30/Jun/2018:21:20:48.466] webcluster webcluster/inst1 1/0/0/1/2 200 279 - - ---- 1/1/0/1/0 0/0 "GET /test.html HTTP/1.1"Jun 30 21:21:58 localhost haproxy[4202]: 172.16.10.8:50353 [30/Jun/2018:21:21:58.114] webcluster webcluster/inst2 0/0/4/1/5

This article is mainly about the simplest solution--dns polling.DNS PollingMost domain name registrars support the resolution of multiple A records, in fact, this is the DNS polling, the DNS server will resolve the request in accordance with the order of a records, one by one assigned to a different IP, so that the simple load balancing is completed.Advantages Basically no cost, because often domai

/128scope:host UPLOOPBACKRUNNINGMTU:65536Metric:1 RXpackets:0errors:0dropped:0 overruns:0frame:0txpackets:0 errors:0dropped:0overruns:0carrier:0 collisions:0txqueuelen:0RX bytes:0 (0.0b) TXbytes:0 (0.0b) lo:0 Linkencap:LocalLoopback inetaddr:172.16.30.100Mask:255.255.255.255 uploopbacKrunningmtu:65536metric:1 Node11 same operationStart the HTTPD service separatelyAccess test650) this.width=650; "Src=" http://linuxu.qiniudn.com/wp-content/uploads/2015/02/ Wpid-4d13c224248612e7ae61bc1f0269c904_a6e

Web server (LAMP) load balancing via DNS polling and NFS sharing, deploying Discuz forumTopology ideas:Server 1:mariadb+nfs;172.20.120.40Server 2:apache+php-fpm;172.20.120.41Server 3:apache+bind;172.20.120.42Server 1:mariadb+nfs;172.20.120.40Yum Install Mariadb-server Nfs-utilsDeploy NFS Share, use LVM as database directory/mydata,

, increase the number of tomcat threads to 1000, and find that the number of errors 500 and 502 has dropped to dozens, but the response time has not improved yet. Later, two tomcat servers were started, and nginx was used for load balancing. the response time dropped by 40%. the processing duration of the two tomcat servers was kept at about 1 second.It seems that tomcat performance is indeed a bottleneck o

has established, and when a request is dispatched to a server, its number of connections increases by 1, and its number of connections is reduced by one when the connection is aborted or timed out.Four, weighted minimum connection scheduling (Weighted least-connection scheduling) WLCThe weighted minimum connection scheduling (Weighted least-connection scheduling) algorithm is a superset of the minimum connection schedule, which is the default algorithm for Ipvsadm. Each server uses correspondi

1 causeRecently, a stress test was conducted on the newly developed web system, and it was found that the response speed of concurrent logon home pages under tomcat's default configuration pressure to 600 people was severely affected, more than 2000 errors of 500 and 502 occur in one round. I made a look at the logon time statistics and printed out the total server processing time. I saw that some responses were indeed within 20 seconds, however, the

1 cause Recently, a stress test was conducted on the newly developed web system, and it was found that the response speed of concurrent logon home pages under Tomcat's default configuration pressure to 600 people was severely affected, more than 2000 errors of 500 and 502 occur in one round. I made a look at the logon time statistics and printed out the total server processing time. I saw that some responses were indeed within 20 seconds, however, the

First, the purpose of the experiment This experiment mainly solves the problem of load balancing and data synchronization of multiple Web servers through NFS. Second, the experimental environment: As shown in the topology diagram above, the MySQL database is installed on the Server1, and Server2 and Server3 share the MySQL database on the Server1 through NFS, w

This article is the use of Apache implementation of Web server load Balancing method for a detailed analysis of the introduction, the need for friends under the reference (regardless of the session version) Requires at least three servers:Server A: Control serverServer B and Server C: actually executing the serverLoad balanc