Home > Workload Solutions > High Performance Computing > White Papers > Dell Validated Design for HPC pixstor Storage > Overview
For PowerEdge R750s servers, each server has 16 NVMe devices directly connected, eight to each CPU, and two HCAs Mellanox ConnectX-6 Single Port VPI HDR 200 Gbps adapters (one per CPU socket). This is a balanced configuration in terms of NUMA domains. For the configuration characterized, we used Dell OEM P5600 1.6 TB PCIe4 devices. Nevertheless, any NVMe device supported on the PowerEdge R750 server is supported for these NVMe nodes. Both CX6 interfaces are used actively to move data, replicate the NVMe NSDs, and as the connectivity for the file system to clients. In addition, they provide hardware redundancy at the adapter, port, and cable level, but performance is affected if only one adapter is working.