system architecture

Hi everyone, there is any good soource of learning the pi vision architecture? i saw videos say i can make few displays by making only 1 display and use assets,group,etc. if someone can suggest, or direct me to an appropriate source:

I have 3 seperate units, and 1 database. all the units have the same topology. at the bottom line i need 3"displays", one for each unit, and of course each dispay have its own tags. what is the best way to do it?

I hope my need was clear. will be happy to explain myself better. thank you