Best way to identify which server creating huge loads towards an NFS volume?

[blazing breach]

We have a volume that creating huge load on our A800. You can easily see that the average CPU peaks to 95% when the volume peaks in R/W.

Is there any good way to find which server that creates this load?
There's a lot of servers that got this volume mounted.

[exotic galleon]

If you enable file system activity/tracking you can see the top files, directories, clients, users, etc