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Fix for CLOUDSTACK-5806 as suggested by community requires implementing isOverProvisionSupported()which will be used to calculate allocated storage as per-primary type basis, thus not restricting this functionality to NFS and VMFS only.
Adding new column used_size to storage_pool table
listStoragePool will have overprovision factor also listed.
Appropriate logs and exceptions will be added.
Appropriate Upgrades will be handled.
Listing Primary Store will have the overprovisionfactor also.