[PERDITION-USERS] number of real servers

Hi there, I am new on perdition, and I got this statement in paper about perdition: "The size of these deployments range from 2,500 to in excess of 250,000 accounts with up to 8 real-servers" Its mean perdition only support to 8 real servers ? Am I right ? In my email system, we have about 40K users and split to 15 servers. Is there any detail information about the maximum real servers will be supported by perdition ? What will happened if we have more than 8 real servers that will be access using Perdition proxy ? Thanks in advance. Regard Ghoest