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Title: NUMAlink  
Author: World Heritage Encyclopedia
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Subject: Silicon Graphics, InfiniteReality, SGI Origin 3000 and Onyx 3000, SGI IRIS 4D, Silicon Graphics International
Publisher: World Heritage Encyclopedia


NUMAlink is a system interconnect developed by SGI for use in its distributed shared memory ccNUMA computer systems. NUMAlink was originally developed by SGI for their Origin 2000 and Onyx2 systems. At the time of these systems' introduction, it was branded as "CrayLink" during SGI's brief ownership of Cray Research.[1]

NUMAlink 2

NUMAlink 2 (branded as CrayLink) was the second generation of the interconnect, announced in October 1996 and used in the Onyx2 visualization systems, the Origin 200 and the Origin 2000 servers and supercomputers.[1] There was no NUMAlink 1, as SGI's engineers deemed the system interconnect used in the Stanford DASH to be the first generation NUMAlink interconnect. The NUMAlink 2 interface was the Hub ASIC. NUMAlink 2 is capable of 1.6 GB/s of peak bandwidth through two 800 MB/s, PECL 400 MHz 16-bit unidirectional links.[2]

NUMAlink 3

NUMAlink 3 is the third generation of the interconnect, introduced in 2000 and used in the Origin 3000 and Altix 3000. NUMAlink 3 is capable of 3.2 GB/s of peak bandwidth through two 1.6 GB/s unidirectional links.[2]

NUMAlink 4

NUMAlink 4 is the fourth generation of the interconnect, introduced in 2004 and used in the Altix 4000. NUMAlink 4 is capable of 6.4 GB/s of peak bandwidth through two 3.2 GB/s unidirectional links.[2]

NUMAlink 5

NUMAlink 5 is the fifth generation of the interconnect, introduced in 2009 and used in the Altix UV series. NUMAlink 5 is capable of 15 GB/s of peak bandwidth through two 7.5 GB/s unidirectional links.[3]

See also


  1. ^ a b "Silicon Graphics and Cray Research Unveil Modular Origin Server Family: High-Bandwidth Systems Revolutionize Computer Buying Economics With Seamless Scalability". Press release. October 7, 1996. Archived from the original on July 7, 1997. Retrieved September 21, 2013. 
  2. ^ a b c "SGI® NUMAlink™ Industry Leading Interconnect Technology". White paper. April 13, 2005. Archived from the original on March 28, 2006. Retrieved September 21, 2013. 
  3. ^ "SGI Altix UV".  
  • Joseph Heinrich, Origin and Onyx2 Theory of Operations Manual, 007-3439-002, Silicon Graphics.
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