Is thin or thick disk recommended for
- Exchange/SQL?
for Exchange: Thick eager zeroed VMDK on a datastore which is not shared by many other VMDKs or RDM.
Ref: http://www.vmware.com/files/pdf/Exchange_2013_on_VMware_Best_Practices_Guide.pdf
for SQL Server: Thick Eager Zeroed, see bellow information
Ref: http://www.vmware.com/files/pdf/solutions/SQL_Server_on_VMware-Best_Practices_Guide.pdf
Remote Desktop Services server?
Normal rule of practice is
if you are dealing with workload where disk growth rate is too high, use Thick disk, else go with Thin.