In deployments that require more than two Filr appliances, place at least one of them, beginning with the third, in the back-end network (see Figure 3-1) and dedicate it to synchronization.
Configure the appliance as follows:
Don’t provide user access through your load balancing hardware or software
Ensure that it is the only Filr appliance with the Allow Synchronization option enabled.
For details, see Net Folder Configuration
in the Filr 2.0: Administration Guide.
This dedicates the Filr appliance to handling full Net Folder synchronizations and minimizes the effect that synchronizations have on user activities.