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K computer
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| Active | June 2011 – August 2019 |
|---|---|
| Sponsors | MEXT,  Japan |
| Operators | Fujitsu |
| Location | Riken Advanced Institute for Computational Science |
| Architecture | 88,128 SPARC64 VIIIfx processors, Tofu interconnect |
| Power | 12.6 MW |
| Operating system | Linux[1][2] |
| Speed | 10.51 petaflops (Rmax) |
| Ranking | TOP500: 18th, as of November 2018[update][3] |
The K computer – named for the Japanese word/numeral "kei" (京), meaning 10 quadrillion (1016)[4][Note 1] – was a supercomputer manufactured by Fujitsu, installed at the Riken Advanced Institute for Computational Science campus in Kobe, Hyōgo Prefecture, Japan.[4][5][6] The K computer was based on a distributed memory architecture with over 80,000 compute nodes.[7] It was used for a variety of applications, including climate research, disaster prevention and medical research.[6] The K computer's operating system was based on the Linux kernel, with additional drivers designed to make use of the computer's hardware.[8]
In June 2011, TOP500 ranked K the world's fastest supercomputer, with a computation speed of over 8 petaflops, and in November 2011, K became the first computer to top 10 petaflops.[9][10] It had originally been slated for completion in June 2012.[10] In June 2012, K was superseded as the world's fastest supercomputer by the American IBM Sequoia.[11]
As of November 2018[ref], the K computer held third place for the HPCG benchmark. It held the first place until June 2018, when it was superseded by Summit and Sierra.[12][13]
The K supercomputer was decommissioned on 30 August 2019.[14] In Japan, the K computer was succeeded by the Fugaku supercomputer, in 2020, which took the top spot on the June 2020 TOP500 list, at that time nearly three times faster than second most powerful supercomputer.[15]
- ^ K computer, SPARC64 VIIIfs 2.0GHz, Tofu interconnect
- ^ Moroo, Jun; et al. (2012). "Operation System for the K computer" (PDF). Fujitsu Sci. Tech. J. 48 (3): 295–301. Archived from the original (PDF) on 28 December 2013. Retrieved 23 May 2013.
- ^ "TOP500 List - November 2018". www.top500.org. November 2018. Retrieved 16 November 2018.
- ^ a b "Japanese 'K' Computer Is Ranked Most Powerful". The New York Times. 20 June 2011. Retrieved 20 June 2011.
- ^ "Japanese supercomputer 'K' is world's fastest". The Telegraph. 20 June 2011. Retrieved 20 June 2011.
- ^ a b "Supercomputer "K computer" Takes First Place in World". Fujitsu. Retrieved 20 June 2011.
- ^ Yokokawa, Mitsuo; Shoji, Fumiyoshi; Uno, Atsuya; Kurokawa, Motoyoshi; Watanabe, Tadashi (1–3 August 2011). The K computer: Japanese next-generation supercomputer development project. IEEE/ACM International Symposium on Low Power Electronics and Design. IEEE. pp. 371–372. doi:10.1109/ISLPED.2011.5993668. Retrieved 30 January 2013.
- ^ Moroo; et al. (2012). "Operating System for the K computer" (PDF). Fujitsu. Retrieved 18 June 2013.
- ^ June 2011 TOP500 Supercomputer Sites
- ^ a b Cite error: The named reference
LINPACK10quadwas invoked but never defined (see the help page). - ^ Kottoor, Naveena (18 June 2012). "IBM supercomputer overtakes Fujitsu as world's fastest". BBC.
- ^ Cite error: The named reference
top500-201711was invoked but never defined (see the help page). - ^ "HPCG - November 2018 | TOP500 Supercomputer Sites". www.top500.org. Retrieved 16 November 2018.
- ^ "Japan pulls plug on K, once the world's fastest supercomputer, after seven-year run". www.japantimes.co.jp. 16 August 2019. Retrieved 30 August 2019.
- ^ "Japan's Fugaku gains title as world's fastest supercomputer". www.riken.jp. 23 June 2020. Retrieved 13 April 2024.
Cite error: There are <ref group=Note> tags on this page, but the references will not show without a {{reflist|group=Note}} template (see the help page).
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