I've configured a TCP Load Balancer in Google Cloud and I can see the option to select more than one single instance group to send traffic.
What does really Google Cloud does when selecting more than two instance group? It balances the traffic using the sum of all instances on both instance groups? or it balances the load on the first instance group and then balances the load on the second instance group?
I'm more interested in the second aproach, so I would like to know how to get this in Google Cloud.
