The SDDC functionality is split across multiple pods. Each pod can occupy one rack or multiple racks. The total number of pods for each pod type depends on scalability needs.

Figure 1. SDDC Pod Architecture


SDDC Pod Architecture


Table 1. POD and Racks Design Decisions

Decision ID

Design Decision

Design Justification

Design Implication

CSDDC-PHY-003

The consolidated pod occupies a single rack.

The initial number of required hosts for the consolidated pod (4 ESXi hosts) are low.

On-ramp and off-ramp connectivity to physical networks (for example, north-south L3 routing on NSX Edge virtual appliances) are supplied to both the management and compute workloads through this rack.

Edge resources require external connectivity to physical network devices.

The design must include sufficient power and cooling to operate the server equipment. This depends on the selected vendor and products.

CSDDC-PHY-004

Storage pods can occupy one or more racks.

To simplify the scale out of the SDDC infrastructure, the storage pod to rack(s) relationship has been standardized.

It is possible that the storage system arrives from the manufacturer in dedicated rack or set of racks and a storage system of this type is accommodated for in the design.

The design must include sufficient power and cooling to operate the storage equipment. This depends on the selected vendor and products.

CSDDC-PHY-005

Each rack has two separate power feeds.

Redundant power feeds increase availability by ensuring that failure of a power feed does not bring down all equipment in a rack.

Combined with redundant network connections into a rack and within a rack, redundant power feeds prevent failure of equipment in an entire rack.

All equipment used must support two separate power feeds. The equipment must keep running if one power feed fails.

CSDDC-PHY-006

Deploy a full featured SDDC with a minimal management footprint and moderate workload capacity.

Allows for a smaller entry point for the SDDC. Allows customers with smaller workload capacity needs the benefits of the SDDC.

Growth past consolidated SDDC workload capacity will require a migration to the full VMware Validated Design for SDDC.