The SDDC virtual infrastructure consists of two regions. Each region includes a management pod and a shared edge and compute pod.

SDDC Logical Design
A two-pod design includes two vDS instances. The illustration shows eight hosts in two clusters.

Management pods run the virtual machines that manage the SDDC. These virtual machines host vCenter Server, vSphere Update Manager, NSX Manager, NSX Controller, vRealize Operations, vRealize Log Insight, vRealize Automation, Site Recovery Manager and other shared management components. All management, monitoring, and infrastructure services are provisioned to a vSphere cluster which provides high availability for these critical services. Permissions on the management cluster limit access to only administrators. This limitation protects the virtual machines that are running the management, monitoring, and infrastructure services.

The shared edge and compute pod runs the required NSX services to enable north-south routing between the SDDC and the external network and east-west routing inside the SDDC. This pod also hosts the SDDC tenant virtual machines (sometimes referred to as workloads or payloads). As the SDDC grows additional compute-only pods can be added to support a mix of different types of workloads for different types of SLAs.