> [rank 0] -> node-0.acme.org
> [rank 1] -> node-1.acme.org
> [rank 2] -> node-2.acme.org
> [rank 0] -> node-0.acme.org
> [rank 1] -> node-1.acme.org
> [rank 2] -> node-2.acme.org
> [rank 0] -> node-0.1core.org
> [rank 1] -> node-1.1core.org
> [rank 2] -> node-2.1core.org
> [rank 0] -> node-0.1core.org
> [rank 1] -> node-1.1core.org
> [rank 2] -> node-2.1core.org