Product : NetApp, NetApp HCI [HCI]/1.8 P1, x86
Feature : Deployment Architecture, Deploy, Design & Deploy
Content Owner:  Herman Rutten
Single-Layer = servers function as compute nodes as well as storage nodes.
Dual-Layer = servers function only as storage nodes; compute runs on different nodes.

Dual-Layer: NetApp HCI is implemented exclusively in a dual-layer architecture consisting of compute-only nodes in one layer and storage-only nodes in a separate layer. This design choice was intentional as to allow for maximum flexibility and performance predictability.