Home > Workload Solutions > High Performance Computing > White Papers > Dell Validated Design for HPC pixstor Storage > Overview
For PowerEdge R650 servers, each server has 10 NVMe devices directly connected, six to the CPU in Socket #1 and four for the CPU in socket #2 (this configuration is not a balanced configuration in terms of NUMA domains), and two HCAs Mellanox ConnectX-6 Single Port VPI HDR 200 Gbps adapters (one per CPU socket). For the configuration characterized, we used Dell AG 1.6 TB (PM1735) PCIe4 devices. Any NVMe device supported on the PowerEdge R650 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. Also, they provide hardware redundancy at the adapter, port, and cable level, but performance is affected if only one adapter is working. The serial port is optional.