actually, the purpose of the additional data centers is geographic diversity. we were occasionally running into situations where there was nothing wrong on our end and nothing wrong at customer end but a problem somewhere in between was blocking traffic. i.e. something like a peering problem between level 3 and another carrier. so we have turned up in Google LA, google north west, google Iowa and google south caroline in addition to our columbus idiots and trenton TN locations.
so, customers in the north west are primary on google NW failover to columbus or trenton. people in south east are primary on google SC failover to trenton. each customer is using one primary one failover.
in addition since we are now looking at having over 5,000 customers added in next two years i wanted “more baskets”