How to configure lode balancing between two PI AF servers?
I would suggest starting by taking a look at both KB00634 - High Availability (HA) options for PI Asset Framework (PI AF) and Network Load Balancing Overview since NLB is now built-in to recent Windows Server version.
If it is your first time configuring an NLB, it is not terribly complicated and there are a lot of step-by-step examples on the web such as this.
We are looking at the same issue, but our infrastructure guys (who have to set up the NLB) came up with the following question:
we are running hardware loadbalancers ourselves and know the way they are working, but our questions was another one.
The loadbalancer is working with health monitors to considering a loadbalanced server healthy or not.
There are multiple ways to do this and we need to know from the application side, what we should trigger to get the status of the application on the server.
So what information should our loadbalancer gather from the server, to consider the application as healthy/functioning?
We will not find this in any documentation of any hardware loadbalancer, the application has to deliver this information.
I am actually not so sure, since AF really only has one performance counter, AF Health. Take a look at the documentation, it may be a good starting point. You could potentially monitor that counter. I will ask some of the guys in our AF team to see if they have any recommendations.
Do you have some more info on your end on what the loadbalancer typically expects?
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