If there are 3 servers, then the step should at least 3, resulting in:
``` Server1: 1, 4, 7, 10, ... Server2: 2, 5, 8, 11, ... Server3: 3, 6, 9, 12, ... ```
So the start value should be the `index` of the server and the increment value has to be at least the number of servers. There is no conflict in such case.