Hi Avinash, and thanks for your time.
We filled a request with Vmware (SR 13413795112) and the support told me that SS-V is not compatible with ESX 5.5. I am only half convinced with this explanation as the ESX 5.1 are working well. I read (i hope thoroughly) the change log but it has no mention about a change in the way ESX 5.5 is reporting (or asking ?) the thin provisionning data...
Moreover, we discovered that we had another issue with ESX 5.5, concerning the io limit of a VM...On a ESX 5.1, the limits are correctly respected (i.e. io limit of 500, we'll see a straight line at 500 io/s under heavy load). But in ESX 5.5, the limit is like a third of what we configured (if we configure 500 iops, we got like 165 iops) and this is clearly not a straight line. It vary between 60 and 180 iops...
Regards,
Vincent.