Thank you very much.
I've already read that document, that's why I had some doubts about the best configuration.
Any guide refers to some 1gbe nics on esxi side and some 1gbe nics on NAS side.
Infact, for example, I've another customer that has a ESXi with two dedicated vSwitches with a vmkernel port and a 1gbe nic each, connected to two 1gbe nics on the NAS box and I got with NFS v4.1 around 2 gigabit transfer rate.
So multipathing and load balancing works good.
But here I have dual 10gbe NICs on a vDS or quad 1gbe NICs on another vDS (instead of normal vSwitch) with NIOC enabled LBT.
So what is the best case to adopt?