The number of servers you have to buy is totally property-dependent. It can be anywhere from 2 to several hundred, but is usually less than 20 in total for the

The number of servers you have to buy is totally property-dependent. It can be anywhere from 2 to several hundred, but is usually less than 20 in total for the median-sized Yahoo property. Could you clarify what you mean by database inconsistencies between stacks?