Tianhe-1

Tianhe-1 and Tianhe-1A

Active	Tianhe-1 Operational 29 October 2009, Tianhe-1A Operational 28 October 2010
Sponsors	National University of Defense Technology
Operators	National Supercomputing Center
Location	National Supercomputing Center, Tianjin, People's Republic of China
Operating system	Linux[1]
Memory	96 TB (98304 GB) for Tianhe-1, 262 TB for Tianhe-1A
Speed	Tianhe-1: 563 teraFLOPS (Rmax) 1,206.2 teraFLOPS (Rpeak), Tianhe-1A: 2,566.0 teraFLOPS (Rmax) 4,701.0 teraFLOPS (Rpeak)
Ranking	TOP500: 2nd, June 2011 (Tianhe-1A)
Purpose	Petroleum exploration, aircraft simulation
Sources	top500.org

Tianhe-I, Tianhe-1, or TH-1 (Chinese: 天河一号, [tʰjɛ́nxɤ̌ íxâʊ]; Sky River Number One)^[2] is a supercomputer capable of an Rmax (maximum range) of 2.5 peta FLOPS. Located at the National Supercomputing Center of Tianjin, China, it was the fastest computer in the world from October 2010 to June 2011 and was one of the few petascale supercomputers in the world.^[3][4]

In October 2010, an upgraded version of the machine (Tianhe-1A) overtook ORNL's Jaguar to become the world's fastest supercomputer, with a peak computing rate of 2.57 petaFLOPS.^[5][6] In June 2011 the Tianhe-1A was overtaken by the K computer as the world's fastest supercomputer, which was also subsequently superseded.^[7]

Both the original Tianhe-1 and Tianhe-1A use a Linux-based operating system.^[8][9]

On 12 August 2015, Tianhe-1 felt the impact of the powerful Tianjin explosions and went offline for some time. Xinhua reports that "the office building of Chinese supercomputer Tianhe-1, one of the world's fastest supercomputers, suffered damage". Sources at Tianhe-1 told Xinhua that the computer was not damaged, but that they had shut down some of its operations as a precaution.^[10] Operation resumed on 17 August 2015.^[11]