Tsm server 6.4.3,
RHEL 6.7
4 Dual-Core AMD Opteron(tm) Processor 8220 SE CPUs
128 gB memory

I recently installed an intel 10 gB Ethernet card.
Iperf3 test shown below gives around 7 gb throughput.
However, when running multiple migration and reclamation processes, and 
watching network traffic through an independent tool, I cannot get over the 900 
mb/s threshold.

The tsm storage pools are on a file system mounted as follows:

Nxback-Pool02.servers.bsu.edu:/volumes/Pool02/TSMBackup/tsm02 /tsminst1/storage 
nfs 
rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys
 0 0

I am running out of options.

I don't expect to see the full throughput, as disk speeds will have a good deal 
of impact.

Any ideas would be helpful.