User guide
This document
(pdf) explains how to enable migration and replication features in NFSv4. It explains how to configure and use them.
Testing summary
This document
(Open Office) gives a bunch of tests cases that have been tested.
It appears that fs_locations and referrals (automatic mounting of filesystems from a different server) are now ready.
But full migration and replication are not possible yet from there is no code in the client to deal with NFS4ERR_MOVED errors.
Evolution
If something was uncomplete or wrong, feel free to contact us to modify these domuments contents.