Myrinet

Myrinet (ANSI / VITA 26-1998 ^[1] ) is a type of high-speed communication medium that has been widely used to build computing clusters from the late 1990s to the early 2010s. In 2003 ^[2] -2005, about 30% of the supercomputers included in the Top500 rating (the most powerful computers in the world) were built using Myrinet. Gradually, this figure fell, for example, falling to 2% in 2009, losing to networks such as InfiniBand , Gigabit Ethernet and faster.

Content

Features

Manufacturer: Myricom company.
Bandwidth: 250 MB / s (2 Gbit / s), 1250 MB / s (Myri-10G, 10 Gbit / s).
The delay time is about 10 μs.
Cables: optical, two fibers (one for sending, the other for receiving)
Topology: switched, the switching element is an 8x8 matrix. Switches based on it support up to 128 ports . To build large networks, various variants of the Fat Tree topology are used; the best performance is achieved using the Clos Network (for more information on building networks based on Myrinet, see the Myrinet Switch Guide ).
Software: low-level programming interface GM , MPICH / GM , PVM / GM , TCP / IP stack , as well as commercial products - MPIPro , Scali MPI Connect .

The following are the most commonly used types of communication networks for supercomputers :

Modern networks:
- 10 Gigabit Ethernet (also 40 and 100 Gbit / s)
- InfiniBand (10, 20, 40 or more Gbit / s in various versions).
Previously used networks:
- Gigabit ethernet
- Scalable coherent interface
- QsNet .

Notes

↑ Choosing the Right Interconnect for Your Cluster Environment // IBM Systems magazine, october 2005: "Myrinet 2000 and Myrinet 10G are single-source implementations of an ANSI standard (ANSI / VITA 26-1998)."
↑ http://homepages.math.uic.edu/~hanson/mcs572/myrinet03clusters.txt "A total of 140 or 28% of the November TOP500 supercomputer sites use Myrinet technology."

Literature

ANSI / VITA 26-1998, American National Standard for Myrinet-on-VME Protocol Specification , November 1998

Links

Myricom official website (manufacturer of adapters and switches Myrinet)
Comparison of tires for supercomputers // T-platforms
7.2.8 Networks of workstations // Interconnection Networks (book), pages 434-437

[1] Choosing the Right Interconnect for Your Cluster Environment // IBM Systems magazine, october 2005: "Myrinet 2000 and Myrinet 10G are single-source implementations of an ANSI standard (ANSI / VITA 26-1998)."

[2] ttp://homepages.math.uic.edu/~hanson/mcs572/myrinet03clusters.txt "A total of 140 or 28% of the November TOP500 supercomputer sites use Myrinet technology."