How Dell Compellent storage work on Xsan?

Hello,

I am going to implementing 25 Mac workstation and a non apple storage (Dell EMC Compellent, dual controller) at customer side.

MAC workstation is OS X Yosemite 10.10.5.

Brocade Firbe switch 16Gb with 24 port(forgot the details model)

DellEMC Compellent SC8000 storage with 300TB space .(checked and confirm SC8K document that can support Apple OS)

I am not quite well on Xsan solutions so I would like to know if any device and software license I need purchase?

1.Must need install /deploy 2 MDC for Xsan ? if need what or which apple product would be best?

2.Do I need purchase Xsan license for each MAC workstaions ? total need connect 25 workstaions.

3. Where I can talk with any Apple expert ?

Thanks