PCI Express-based fabrics: A low-cost alternative to InfiniBand
By building on the natural strengths of PCI Express (PCIe) -- it's everywhere, it's fast, it's low power, it's affordable -- and by adding some straightforward, standards-compliant extensions that address multi-host communication and I/O sharing capabilities, a universal interconnect now exists that substantially improves on the status quo in high-performance cloud and data center installations.