Myrinet

Myrinet is a high speed interconnect supplied by Myricom, an HPC interconnect company. Myricom originally manufactured a 2 Gb/s technology (Myri-2G), which was arguably the most widely deployed low latency clustering technology of its time.

Myrinet, ANSI/VITA 26-1998, is a high-speed local area networking system designed by Myricom to be used as an interconnect solution between multiple machines to form high performance compute clusters. Myrinet has much less overhead than Ethernet, and provides better throughput, less interference, and lower latency while avoiding use of the host CPU. Myrinet includes a number of fault-tolerance features, mostly backed by the switches. These include flow control, error control, and "heartbeat" monitoring on every link. The newest "fourth-generation" Myrinet, called Myri-10G, supports a 10 Gb/s data rate and is inter-operable with 10 Gigabit Ethernet. Myri-10G can provide ~2.3us MPI latency at 9.6Gb/s(9,600 Mb/s) raw full duplex bandwidth.

Part of the Myrinet Interconnect is the Myrinet Express API driver tools. This permits software to directly utilize high-speed interconnects, bypassing the OS, facilitating very low latency inter-node communications. The Myrinet Fabric Management System (FMS) provides advanced monitoring and configuration tools to help ensure the continued performance of your network.