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From Wikipedia, the free encyclopedia

Serial HIPPI fibre optic cable
Serial HIPPI fibre optic cable

HIPPI, short for High Performance Parallel Interface, is a computer bus for the attachment of high speed storage devices to supercomputers, in a point-to-point link.[1] It was popular in the late 1980s and into the mid-to-late 1990s, but has since been replaced by ever-faster standard interfaces like Fibre Channel and 10 Gigabit Ethernet.

The first HIPPI standard defined a 50-wire twisted pair cable, running at 800 Mbit/s (100 MB/s) with maximum range limited to 25 metres (82 ft), but was soon upgraded to include a 1600 Mbit/s (200 MB/s) mode running on Serial HIPPI fibre optic cable with a maximum range of 10 kilometres (6.2 mi).[2]

HIPPI usage dwindled in the late 1990s. This was partly because Ultra3 SCSI offered rates of 320 MB/s and was available at almost any computer store at commodity prices. Meanwhile, Fibre Channel offered simple interconnect with both HIPPI and SCSI (it can run both protocols) and speeds of up to 400 MB/s on fibre and 100 MB/s on a single pair of twisted pair copper wires. Both of these systems have since been supplanted by even higher performance systems during the 2000s.

GSN - HIPPI-6400 card
GSN - HIPPI-6400 card
Serial GSN HIPPI-6400 fibre optic cable
Serial GSN HIPPI-6400 fibre optic cable

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GSN - HIPPI-6400

In 1999 in an effort to improve the speed resulted in HIPPI-6400,[3] which was later renamed GSN (for Gigabyte System Network) but this saw little use due to competing standards and the high cost of GSN. GSN has a full-duplex bandwidth of 6400 Mbit/s or 800 MB/s in each direction. GSN was developed at Los Alamos National Laboratory and uses a parallel interface for higher speeds. GSN copper cables are limited to 50 metres (160 ft) and fibre optic cables limited to 1 km.[4]

HIPPI is the first “near-gigabit” (0.8 Gbit/s) (ANSI) standard for network data transmission. It was specifically designed for supercomputers and was never intended for mass market networks such as Ethernet. Many of the features developed for HIPPI are being integrated into such technologies as InfiniBand. What is remarkable about HIPPI is that it came out when Ethernet was still a 10 Mbit/s data link and SONET at OC-3 (155 Mbit/s) was considered leading edge technology.

See also


  1. ^ "HIPPI FAQs". High Performance Networking Forum. 1999-02-26. Archived from the original on 2009-09-16. Retrieved 2009-06-02.
  2. ^ Tech Target, HIPPI (High-Performance Parallel Interface), March 2011, by Rosario D'Elia, Mark Motsko, and Stephen C. Tenbrink 
  3. ^ "HiPPI-6400/Gigabyte System Network". Los Alamos National Laboratory. 2001. Retrieved 2015-01-12.
  4. ^ CERN Courier, The Gigabyte System Network is demonstrated at CERN, Nov 2, 1999
This page was last edited on 17 January 2021, at 23:01
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