Hello Lalegre
This may depend on how the Thick is applied:
- If you have applied an SP (Storage Policy) to the VMs/Disks with OSR=100(Object Space Reservation) then applying an identical SP with OSR=0 should Thin these instantly.
- If this was applied at the 'Hard Disk' primitive level then unfortunately I think this will require a SvMotion of vsanDatastore to somewhere else (select Thin on destination) and then SvMotion back.
- If the Data-Objects have proportionalCapacity=100 (functionally the same as OSR=100) applied to them but are using an SP with OSR=0 then this is a different story with a different fix that I have answered in a few other places on Communities and can advise on (if present).
"Also vmkfstools works on vSAN?"
Yes it does (assuming you are talking about -i clone), you have to specify a particular flag (-W vsan) so that it creates the resulting disk as a vSAN Object and not a -flat.vmdk - while this might Thin your disks without requiring an alternate datastore this can't be done powered on.
Bob
