I have always approached this from the hosts, checking each host with a script. NFS3 is stateless, which means you can't just check active sessions. 

On Wednesday, 13 April 2016, Robert Clark <robert_clark@mac.com> wrote:

Is anyone aware of a way to check which clients have a particular NFS export mounted, in 8.2.2?

 

I’ve installed and worked with the showmount command written in python, but it appears to only output the export list.

 

Thanks,

[RC]