UID /GID with NFS and ZFS

I have a server with a zfs file system (nexenta core), and I'm sharing files overs nfs with zfs share share_nfs.

When I mount the file system on my client (a ubuntu workstation) I can't have the original UID/GID :(

I mount my client with the following options : 192.168.1.4:/home /media/testnfs nfs rw,dev,noexec,nosuid,auto,nouser,noatime,rsize=8192,wsize=8192 0 0

If I configure idmapd I have nobody:nogroup and without idmapd I have 4294967294:4294967294, how can I get the original ID's ?

Is it a problem with the nfs server or the client ?

Thanks for answers.

NFSv4 doesn't use UID/GIDs anymore. There are quite a few significant differences between NFSv3 and v4; security is one of them.