ADFS 2.0 farm setup in two different data-center with two different subnet

Hi Team,

I have scenario where I have to deploy the ADFS 2.0 Farm with SQL database back-end in two different datacenter which is having different subnet. In case first data-center goes down ADFS will still be working.

Questions and doubts are:

1) Is ADFS 2.0 Farm support in different datacenter, Can possible to extend to multiple datacenter ?

2) Can ADFS Farm have one node in one subnet other node in different subnet ?

3) In different subnet scenario, SQL Database will be accessed by both the nodes ?

4) In case for DR scenario if we Mirror database and one node ADFS instance is available in DR site how to bring that node online ? or how to make it work ?

Thanks,

Khaleel Ahmed