[NFS-Ganesha-Devel] Best way to count number of clients?

For monitoring and load balancing purposes, I'd like to count the number of connected (NFS) clients to Ganesha. I tried to do this, but didn't get very far: For NFSv3, I increment a gauge (counter) on mount and decrement on umount. For NFSv4, I'm not sure how to do this. I don't understand how connections are established. Questions: What is the most accurate way of counting clients? Which code accepts and closes TCP sessions for nfsv4? What happens when an nfsv3 goes away without issuing a umount call? Thanks, Bjorn