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With this feature, Vmware datacenter will be put under management of CloudStack zone.

In previous releases, Vmware datacenter is hidden behind a CloudStack cluster, we need an explicit mapping policy for Vmware datacenter both for zone-wide storage and zone-wide network resources. This makes datastore in a DC to span across clusters scoped by cloudstack zone. Also this means dvSwitch in DC spans across clusters in the zone. VM live migration across clusters in zone can be realized with this modelmodel allows a datastore/dvSwitch, scoped at DC, to be managed/used as zone level resource which has use cases like zone wide primary storage, storage live migration across clusters within a zone, orchestration of virtual network spanning across clusters in a zone.

1:1 relationship between vSphere DC to CloudStack zone is a natural mapping from resource point of view, whether it's storage (datastore) or network (distributed switches etc.). Within the zone/DC, it's possible to have multiple vSphere clusters (within the same DC). And this will have the implication that CloudStack zone size (how many hosts within a zone) will be limited to what vSphere allows. See 1, 2 & 3 in References section.

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