Re: balancing the load evenly
Hello, On Thu, Aug 06, 2009 at 04:38:57PM +0200, Magnus Hansen @ mingoville wrote: > Hello... > > I am very happy with the haproxy, but the result of my loadbalancing > confuses me... > > I believe my configuration is fine, but one of my servers are getting > hit much more than the others > I have tried with leastconn, roundrobin, and source. All are producing > more or less the same result which is that the same one of my servers > is chosen above the others... > > My main newbee question is of course Am i missing something? > > The one usually getting hit is jettysmall1 and even lowering the > weight seems to help The lowest weight i have tried is half as > much as the others well, the fact that "balance source" does not cause an even load depends on the traffic distribution across source IP addresses. It only works fine with thousands of clients. otherwise, roundrobin gives a perfectly balanced distribution across all your servers. If you see that one server is more loaded than others with roundrobin, either you see that it gets more cumulated connections, which may happen if other servers regularly fall down and get up, or you see that it gets more concurrent connections, which indicates it shows higher response times, probably due to its sizing or sometimes a local trouble, such as poor network connectivity. In the last case, using "leastconn" will get rid of this, but this server will then receive a lot less cumulated connections than others, because it takes more time to complete each of them. I suggest that you re-enable roundrobin and check the stats page to identify the reason for the difference. Regards, Willy
balancing the load evenly
Hello... I am very happy with the haproxy, but the result of my loadbalancing confuses me... I believe my configuration is fine, but one of my servers are getting hit much more than the others I have tried with leastconn, roundrobin, and source. All are producing more or less the same result which is that the same one of my servers is chosen above the others... My main newbee question is of course Am i missing something? The one usually getting hit is jettysmall1 and even lowering the weight seems to help The lowest weight i have tried is half as much as the others Many thanks Magnus global log 127.0.0.1 local0 log 127.0.0.1 local1 notice #log loghostlocal0 info maxconn 600 user root group root defaults log global modehttp option httplog option dontlognull retries 5 option redispatch contimeout 15000 clitimeout 19 srvtimeout 19 option httpclose option forwardfor listen webfarm 10.244.186.18:80 modehttp acl url_jetty path_beg /info /um /ws /amf /sm /fm /product /game acl url_php path_end php acl url_unilogin path /um/login/unilogin.php stats enable stats hide-version stats uri /admin?stats stats realm Haproxy\ Statistics stats authadmin1:passwd use_backend jetty if url_jetty !url_php or url_unilogin default_backend static backend jetty balance source # or leastconn or rounrobin cookie HAP_SERVERID insert nocache indirect server jettysmall2 10.244.126.97:8080 cookie omega maxconn 150 weight 10 maxqueue 30 check fall 10 inter 4000 server jettysmall3 10.244.125.175:8080 cookie delta maxconn 150 weight 10 maxqueue 30 check fall 10 inter 4000 server jettysmall4 10.244.150.245:8080 cookie epsilon maxconn 150 weight 10 maxqueue 30 check fall 10 inter 4000 server jettysmall1 10.244.146.51:8080 cookie gamma maxconn 150 weight 7 maxqueue 30 check fall 10 inter 4000 backend static balance source # or whatever server apache1 10.244.186.18:81
