Hi Moncy,
CVO has Fabric pool license for free which means every CVO can tier off data to the object storage of that cloud it is running in. While the license is free, the customer will pay the object storage costs.
Cloud Tiering is a totally different solution, also using Fabric pool, in which you tier off data from AFF/FAS to object storage in the cloud.
That one has a license you may need to purchase, though you can do it directly through Cloud Manager as well.
Storage costs are, again, are paid for by the customer.
AFF/FAS DO NOT tier data to CVO.
You can SnapMirror data to CVO who will in turn tier off that data of the secondary copy.
Primary tiering happens to the object storage in the cloud and the storage costs are for the customer.
All of the licenses you may need to buy (FabricPool for Cloud Tiering, and CVO) include support and do not cover the object storage costs.
Cloud Manager is free of license (But need to run 24/7) and includes support as well.
Best,
Yaron Haimsohn
Director, Cloud Solutions Architecture