Home > Storage > PowerFlex > White Papers > Red Hat OpenStack Platform 16.1 with Dell EMC PowerFlex family > Solution Admin Host architecture
The SAH node is a central administration server that hosts number of mission critical VMs which communicate using bridged networks and is responsible for performing the deployment, management, and operations tasks on RHOSP environment. The SAH node is running with Red Hat virtualization which is built on top of a Dell EMC PowerEdge server. It hosts infrastructure VMs such as the Red Hat OpenStack director or undercloud VM, PowerFlex Gateway, DNS, overcloud controller VMs and so on.
The following figure represents a SAH 3-node cluster configured with HA for mission critical VMs.