GlusterFS + Arbiter on multiple subnets

[SirBaeK]

Hello, I have a question, how to run GlusterFS with Arbiter on different subnets? We have 2 Gluster nodes (2x XCP-NG) connected to each other by a 10G uplink without a switch, where one node has IP 10.10.10.10 and the other has IP 10.10.10.11, both of them see each other through these IPs (using /etc/hosts) and are able to create Gluster through these IPs and at the same time these nodes are connected to a router (FreeBSD), through a 1G switch and have IP addresses node1: 192.168.0.10 and node2: 192.168.0.11, router: 192.168.0.1
The question is, how much network traffic will there be and where?
Metadata is stored on the arbitrage, I know that, but if the smallest metadata file is 4Kb and I have 20 files that change 2000 times in 1s, that's about 1.28Gbps of traffic per arbitrage, right? If so, will the traffic from both nodes to the arbitrage be 2.56Gbps, or just 1.28Gbps? And is it worth it to have a 10G connection between the Gluster nodes?