We are using a single server as the Domain controller and File Server for our branch office. We want to introduce an server as a second Domain Controller and backup for file server. We want to replicate the shared folder to the new server and use it when
the primary server are down.
Can we use DFS in this case. Is it a good idea and any concern about the setting?
If you are looking at node recovery in the event of file server failure - you should choose file clusters or server 2012 provide new functionality for high available file servers ( continuous available file windows server )
eg; if you are having shared storage - you can create multiple file servers pointing to shared storage and then create DFS namespace.
It depends how you want to structure your file server for failover
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