30gbps iperf is good. you're not going to do much better than that without newer CPUs and some kernel tweaking. 45MB/s file shares sounds like NFS with sync=enabled or something
I am doing an rsync between two systems to replicate the data.
These are both 2620 Xeon V2 so relatively new. I'd love to know what kind of kernel tweaking i can do.
The 40GB ports are all in their own VLAN seperated out from any network and traffic. fully isolated. I have 10GB ports I can hookup as well.