Single SharePoint 2013 Farm for two geographical locations

Question

Dear All,
I want your expert advise and suggestion on an "Architecture" for Deploying SharePoint 2013 in multiple geographical locations. I have read every line in article:http://technet.microsoft.com/en-us/library/gg441255%28v=office.15%29.aspx before posting
this question, for the following scenario:
Scenario:
Two locations, say, Loc1 and Loc2.
SharePoint Farm = Collection of SharePoint servers connected to the same Configuration DB.
WFE1 will be in Loc1 and WFE2 will be in Loc2 (and connected to the same config DB i.e. same Farm).
App1 will be in Loc1 and App2 will be in Loc2 (and connected to the same config DB i.e. same Farm).
Users from Loc1 will be directed to WFE1 and Users from Loc2 will be directed to WFE2.
App1 will run services and service applications consumed by web applications specific to Loc1.
App2 will run services and service applications consumed by web applications specific to Loc2.
I can implement all of the above.
Now question is "How to provide local flavor for back end SQL?"
suppose, I configure "Active-Active" SQL clustering SQLNode1 at Loc1 and SQLNode2 at Loc2, how do I specify that web applications meant for Loc1 are fetched from SQLNode1 and web applications meant for Loc2 are fetched from SQLNode2.
Users in Loc1 are not interested in web applications meant for Loc2 and vice-versa. Currently we are having Two (2) different farms at each location, but going forward we want to consolidate so that "Infrastructure maintenance" is minimized and
investment in third party solutions can be leveraged by both locations.
Naveed.DG MCITP, MCTS -SharePoint 2010 Administrator "Vote As Helpful" If it helps!!

Answer 1

How far away are these SharePoint servers away from each other? Remember that regardless of where a SharePoint server is, it must be able to write to the active instance of the Configuration database, and must have that 1ms timing.
Active-Active SQL clusters has never been mentioned, as far as I'm aware, in TechNet documentation. I'd consider this scenario unsupported unless you talked to PSS otherwise.
Trevor Seward
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