NFSv4 and UIDs on OpenSolaris and Ubuntu

NFS clients and servers negotiate to use the highest NFS version they both support. NFSv4 usually performs much better than NFSv3, but requires a little more setup. Here I get NFSv4 working between an OpenSolaris file server and a diskless Ubuntu client. In theory, a plain mount(8) gives us a NFSv4 mount.

# mount server:/data1/opennebula/on22 /mnt/

#

Use nfsstat -m to see what kind of mount they negotiated

# nfsstat -m
...
/mnt from server:/data1/opennebula/on22
Flags...