Storage Spaces Direct (S2D) is a core technology of Microsoft Azure Stack HCI that uses industry-standard servers with locally attached drives to create high-available software-defined storage. S2D is included with Microsoft Windows Server 2019 Datacenter and Windows Server 2016 Datacenter editions.
S2D has two deployment options: converged and hyper-converged. In a converged deployment, storage and compute resources are in separate clusters while a hyper-converged deployment uses one cluster for compute and storage which can simplify deployment and reduce hardware costs.
This paper presents performance benchmarking results for Windows Server 2019 Storage Spaces Direct (S2D) in a hyper-converged deployment scenario using Chelsio 25 Gigabit Ethernet (25GbE) iWARP RDMA adapters which enable incremental, non-disruptive server installs, and supports the ability to work with any switch infrastructure. This enables a decoupled server and switch upgrade cycle and delivers a brownfield strategy to enable high performance, low cost, scalable S2D deployment.