Is their an API for the following NFS per client stats. IT looks like this command has been moved to hidden statistics-v1 in 8.2. Looking through the perf objects I do not see any objects that correlate to the object "client"
cluster::*> statistics settings modify -client-stats enabled
Warning: System performance may be significantly impacted. Are you sure?
Do you want to continue? {y|n}: y
cluster::*> statistics show -object client