lvm - drbd - lvm

Hi guys,

I'd like to get some opinions on how to best combine lvm and drbd.

lvm -> drbd

or

drbd -> lvm

or

lvm -> drbd -> lvm

What are the advantages of these combinations?
From my understanding:

lvm -> drbd : provides me an easy way to resize the underlying lvm partition without risk.

drbd -> lvm : gives me more flexibility on every single VMs LV

lvm -> drbd -> lvm : gives me the best of both worlds at the cost of extra complexity. I can resize the underlying partitions and also individuality easy manage every VMs LV.


What setup are you running and why?
Should I be concerned by bad performance if I go for the nested lvm -> drbd -> lvm concept?