i check the network throughput on the filler side and is not reaching 10gbit
Iperf3 between netapp and node show 9.5gbit
notes: using ubuntu 18.04
the real symtom is some vms start getting high "Waiting for I/O" and when i go to the node and trying to perform ls to the mountpoint the computer freeze arround 3 4 5 seconds to perform a list of 60 files
something that i do is create another lif with a different ip/port and remount to another mount point . when the issue happend on the normal mount point if i try to list to the second mount point works great
It sounds like the only difference between the good and bad setups are the physical path the connection traverses. I would recommend looking at the ifstat counters on the two different ports. Packet loss can have a profound impact on TCP performance due to congestion control algorithms. A packet trace collected against the bad port would be allow you to rule in/out the network.