How nginx proxy works

[Eberx]

Hello,

Thank you for reply. I'm using round robin load balancing on nginx. I can
see the how many connection is established on backend server. It shows for
example 

backend server 1  = 100 connection
backend server 2  = 99 connection

Does it mean unique 199 connection ? or unique ~100 connection ?

Is only ip_hash method for unique connection ?

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,261046,261048#msg-261048