Back in my day we measured things in Ks, not Ms or Gs or Ts. Get off my lawn... But seriously, UUIDs work, they don't need application code to avoid collision

Back in my day we measured things in Ks, not Ms or Gs or Ts. Get off my lawn... But seriously, UUIDs work, they don't need application code to avoid collisions. If you want something a bit more compact/shardable, use ULIDs.