Here is my setup. Using NFS I have a 3170 connected to a Nexus 5020 via 10G . My client is connected via Ethernet to the FEX which is connected to the 5020 via fiber.
My read/write numbers don’t make sense to me. When I write a 5G file to the NFS share I am getting an average of 270MB/s. To write the file I am doing ‘dd if=/dev/zero of=filename1 bs=1024k count=5120’
This is where I am confused. Since the client is connecting to a fex at 1gigabit Ethernet, it is telling me that I am writing faster than the line speed. So gigabit Ethernet is 1,000,000,000bits/s when you convert the 270MB/s to bits I am getting 2,122,317,824.
What am I missing here? How do I figure out the accurate number for what I am actually writing at?