VxRail scale-out clusters start with as few as two nodes and can grow in one-node increments up to 64 nodes, providing performance and capacity to meet a wide range of use cases. New systems can be added non-disruptively and different models can be mixed within a VxRail cluster. Flexible storage options also allow a node to start with a few drives and add drives as capacity requirements grow, as shown in the following figure. Single node upgrades and drive scalability protect an optimized initial investment by allowing customers to start with what they need and expand the VxRail cluster by adding nodes and/or drives to increase performance and capacity as needed. Consult the Dell representative for assistance.
A few basic rules regarding scaling are worth considering for planning:
With VxRail, nodes can upgrade or add memory, NIC cards, cache drives, and capacity drives. GPU can be upgraded or added in the supported node types. It is not possible to upgrade from all-flash to all-NVMe.