Research your hardware.
Make sure you plan properly for power supplies, outlets and PDU'S if needed.
Then research things like exhausting the heat. If you look for that information you should be able to avoid unpleasant surprises.
Also check the hardware thread for the s9 there will be all sorts of info about running them.
Same here im newbie for using a bitcointalk i hope your waste your time in answer the question to many thread in bitcointalk and then your activity will increase 14 within 2weeks i hope i help you and help us to learn more how to use and hot to get.
This is useless my advice make sure you are contributing to the OP's topic or you will be labelled a shitposter