Best ZFS performance on Guest LDom

Hello,

I would like to know what is the best way to build a Guest LDom with ZFS Filesystem. I tried the following.

      -  1)  Créate Zpool and ZFS Volume from I/O Domaine, then use it inside Guest Ldom like a UFS filesystem and install Solaris 10 OS.

      -  2)  add 4 LUN inside my Guest LDom from i/o Domain, then create a Zpool rpool to install Solaris 10 and another Zpool to install data.

In fact in point 1 we create a Zpool outside the Guest LDom, end in the point 2 we create a Zpool inside the Guest Ldom. Can you tell me in term of performance what is the best.