@Danp That's the same image I referenced but with everything at a single site. I'm looking for details regarding the hosts and SRs. In the documentation that's all hidden inside that green XenServer XCP-ng box.
My concurrency is only 1 right now because I'm trying to find my bottleneck. Regardless of what it's set to, I'm stuck at ~150MBps for the whole backup job. But that's just what the UI reports. Looking at the network stats I see different things moving anywhere from ~50MBps to over 500MBps.