Initially, we placed the DFS function on the 2 domain controllers but the login times are getting longer/slower and the CPU/memory resources on the 2 domain controllers are almost flatline during peak hours where a lot of users are reading and writing files on the servers. To mitigate this, we plan to deploy 2 new domain controllers, demote the 2 old domain controllers and leave the DFS function on the old servers.
I know that a domain namespace is highly dependent on Active Directory -- is there going to be a performance issue if we split the DFS function from the domain controllers? Is our plan the best approach or is there a better one?