Product : VMware, vSAN [SDS]/7.0 U1, Enterprise
Feature : Stretched Cluster (SC), Disaster Recovery, Data Availability
Content Owner:  Herman Rutten
VMware vSphere: Yes (certified)
There is read-locality in place preventing sub-optimal cross-site data transfers.

vSAN 7.0 introduces redirection for all VM I/O from a capacity-strained site to the other site, untill the capacity is freed up. This feature improves the uptime of VMs.

The Stretched Cluster feature is only available in the Enterprise edition of vSAN.