On Mon, Mar 16, 2015 at 10:44 AM, Fraj KALLEL <frajkal...@gmail.com> wrote: > Hello, > > I use haproxy v1.4 as load balancer in front of 2 web servers (webA and > webB). > webA has more resource (RAM, CPU, HDD) than webB, and I used roundrobin as > algorithm of balance. > > This is the config file of the haproxy. > > global > log 127.0.0.1 local0 > log 127.0.0.1 local1 notice > #log loghost local0 info > maxconn 4096 > #debug > #quiet > user haproxy > group haproxy > > defaults > log global > mode http > option httplog > option dontlognull > retries 3 > option redispatch > maxconn 2000 > timeout connect 5000ms > timeout queue 5000ms > timeout client 25m > timeout server 25m > > listen webfarm 192.168.1.28:80 > mode http > stats enable > stats auth stelb:abcder > balance roundrobin > appsession PHPSESSID len 64 timeout 3h request-learn prefix > option httpclose > option forwardfor > option httpchk HEAD /check.txt HTTP/1.0 > > acl white_list src 127.0.0.1 192.168.1.0/24 > http-request allow if white_list > http-request deny > > acl restricted_page path_beg /images > > server webA 192.168.1.23:80 cookie A check > server webB 192.168.1.24:80 cookie B check > > > After periode of utilization I find that webA receive more traffic than webB > while by definition roundrobin algorithm assign to each process in equal > portions and in circular order, handling all processes without priority > (also known as cyclic executive). > > Is this a normal compotement ? > > Thanks. > > Sincerly yours, > Fraj KALLEL
Hi Fraj, This is normal and this is due to persistence. More information on this blog post: http://blog.haproxy.com/2012/03/29/load-balancing-affinity-persistence-sticky-sessions-what-you-need-to-know/ There is no rule, either A or B could get more requests. Baptiste
