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Did this 20 years ago by having the name of the server as part of the user's profile.

User's 1 through 50 (light users) log in and their profile says they go to app-1.myapp.com. User's 51 through 60 (heavy users) log in and their profile says they go to app-2.myapp.com.

A specific user may pay extra to have a non-shared environment, and this supports that as well.

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Did this 20 years ago by having the name of the server as part of the user's profile.

I had a simple lookup table in mind so it can be easily changed and adjusted as required without affecting the user's profile.

i did something similar way back when only the server identifier was part of the session cookie iirc. Whichever server behind the LB started the session got all the requests for that session. It was more like a user load balancer vs a request load balancer.

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