[Freeswitch-users] help in architecture

Hi, Hope you all are having a good day. :) I need some suggestions in designing SIP trunking with freeswitch. We are required to register more than 10,000 users on multiple freeswitch instances sharing same database. How can we load balance registration on each freeswitch so, they have equal number of registrations. I know with mod_xml_curl i can have freeswitch share same database. But how can i load balance registrations? (inbound calls must be directed to that freeswitch with which user is registered) Or any suggestion how we can achieve this, so, that we can add more freeswitch in future. Thanks for your help.