Each deployment of a cloud SDDC contains at least a single vSphere HA and DRS cluster that runs all management virtual machines and customer workload virtual machines. The initial cluster contains three or four ESXi hosts. Each ESXi host provides 36 cores running at 2.3 GHz, 512 GB RAM and 16 TB all-flash NVMe devices to the cluster. The workload virtual machines running inside the SDDC cluster consume a dedicated cluster-wide vSAN datastore. A cluster can be expanded up to 16 hosts, all of which have identical hardware capabilities.
Each ESXi host provides 25 Gb/s of network bandwidth within the Cluster SDDC. Network I/O Control prioritizes the bandwidth between the several network traffic streams if contention occurs. The SDDC cluster leverages native NSX technology that integrates AWS networking infrastructure. The customer can create logical networks to provide VMs network connectivity to other networks and the Internet if preferred. The management virtual machines, such as the vCenter, NSX Manager, and NSX Edge virtual machines run inside the cluster and are grouped in a separate vSphere DRS resource pool.
A cloud SDDC cluster is dedicated to a single customer. Existing AWS controls ensure customer segregation using dedicated AWS accounts and AWS Virtual Private Connections (VPC) for each cloud SDDC deployment. Because vSAN is built out of instance local storage and each ESXi host is dedicated to a single customer, there is no sharing of resources across different customers inside the SDDC compute, network or storage layers.
Detailed procedural information can be found about deploying SDDCs in the Deploy an SDDC from the VMC Console documentation.