A high-speed interface used to connect storage networks and computer clusters, introduced in 1999. Using switched, point-to-point channels similar to mainframes and also similar to PCI Express (switched version of PCI), InfiniBand is designed for fabric architectures interconnecting devices in local networks.A Technology MergerSupporting both copper wire and optical fibers and originally known as "System I/O," InfiniBand is a combination of Intel's NGIO (Next Generation I/O) and Future I/O from IBM, HP and Compaq. For more information, visit the InfiniBand Trade Association at www.infinibandta.org. See RDMA, PCI Express, NGIO and Future I/O. INFINIBAND SIGNALING SPEEDS IN EACH DIRECTION (Gigabits per Second) Data transfer rate is 80% of signaling speed. Type Number of(DR = Bonded Channels data rate) 1x 4x 8x 12xSingle (SDR) 2.5 10 20 30 Double (DDR)5 20 40 60 Quad (QDR)10 40 80 120 14 (FDR)14 56 112 168 Enhanced (EDR) 26 104 208 312
An architecture and specification for data flows between processors and high performance I/O devices such as servers in a storage area network (SAN), InfiniBand is a high-performance switched fabric interconnect standard.The baseline 1X InfiniBand specification supports a signaling rate of 2.5 Gbps using 8B10B coding, which yields a data rate of 2 Gbps. The more capable 4X specification quadruples the signaling rate to 10 Gbps and the data rate to 8 Gbps by spreading a datastream over four bonded links. The 12X specification supports a signaling rate of 30 Gbps and a data rate of 24 Gbps. Double-rate and quad-rate options effectively double and quadruple each of these theoretical speeds. See also 8B10B, architecture, bonding, and SAN.