Its only http and https. The site is not a forum but a site with a lots of transaction such as accounting, etc.
When I tried to use leastconn, it affects some transaction such as authentication. backend says he was successfully disconnected while the web interface says he was still logon so I revert to round-robin and everything back to normal except not balance bytes or traffic.
It will depend on the type of traffic and application in fact. A site such as a forum or similar where people never go away can indeed stick users for a long time to a server. But after all, that's the precise reason you're using cookies in the first place.
