10gigE seams fast, but in reality it's only 1.25GB/s in an ideal case. One enterprise PCIe SSD drive will saturate that. Or 5x of the old style 3.5 inch 7.2k RP

10gigE seams fast, but in reality it's only 1.25GB/s in an ideal case. One enterprise PCIe SSD drive will saturate that. Or 5x of the old style 3.5 inch 7.2k RPM drives (you can fit 12 of these in a dense 1U case). That why you see 40gigE or 56gigE used in HPC.