GigaIO announced FabreX release 2.2, the native PCI Express (PCIe) Gen4 universal dynamic fabric, which supports NVMe-oF, GDR, MPI, and TCP/IP. The new release introduces an industry first in scalability over a PCIe fabric for AI workloads by enabling the creation of composable GigaPods and GigaClusters with cascaded and interlinked switches. Intel Optane SSDs continue to communicate over native PCIe, as they would if they were still plugged into the server motherboard, for the lowest possible latency and highest performance.
Source: https://www.helpnetsecurity.com/2021/04/21/gigaio-fabrex-2-2/