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#129554 - 08/09/06 04:26 PM Re: Tracking not working correctly 6.5.5.
Fred Offline
member 		Registered: 08/10/06
Posts: 115
Well,

We are up to about 400 users now and I'm getting beat up left and right over it. For the most part it works for me, but then there will be a forum that the light bulb will just not go out in. I have other users with similar issues and now I am getting reports of all the lightbulbs being off even when there are new posts. It is frustrating and all I can tell them is it will change when version 7 comes out. I get about 5 to 10 complaints a day about this.

Fred
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#129555 - 08/28/06 08:09 PM Re: Tracking not working correctly 6.5.5.
Rob Kingsbury Offline
stranger 		Registered: 08/28/06
Posts: 1
Quote:

What's strange is there are some server/setups this works flawlessly on. I talk with some people that never have a problem or complaint about it, while others have all sorts of problems.



I run our boards from multiple servers behind a load balancer and, before the upgrade to 6.5.5 (from 6.4.4 I think), I had straight, round-robin balancing; meaning anyone who hit a page had, pretty much, an equal change of hitting one of the 4 servers behind the load balancer and each user would hop around between servers the whole time they were looking at the boards. When I did the upgrade, we started having the same problem mentioned here and in a couple other threads.

It looks like, during a user's visit, posts that they have read during that visit are stored in a PHP session, which is local to a particular server. So, when a user would bounce between our 4 servers, they'd get all sorts of weird results because each server behind the balancer had a different idea of who had been where. All I had to do to fix it was turn on 'persistence,' which basically means that a user, over a period of time (usually a single visit via a temporary cookie), keeps hitting the same server over and over again instead of bouncing around all over the place.

I bet most people in a hosted environments don't even know if they're site is being served from one host or from multiple hosts behind a balancer and, if so, whether that balancer has a notion of session persistence or not.
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