No, every server will have its own series:

  Server 1: [1 4 7]
  Server 2: [2 5 8]
  Server 3: [3 6 9]

Or whatever is appropriate. You can even add/change this later on.

Again, I'm not saying it's necessarily the best solution, I'm just saying it's possible. I'm not really interested in a long discussion about uuid vs. serial because it's been done to death a million times. Previous poster said it's impossible and that's just flat-out wrong.