Japan's K Computer Remains as the World's Most Powerful Supercomputer

There is a recently released list of the Top 500 most powerful computers in the world, and once again Japan's K Computer takes the number one spot with an increase from 8.162 petaflops to 10.51 petaflops per second. This balances out to 10.51 quadrillion floating-point operations per second. The letter "K" is short for the Japanese word "kei", which symbolizes 10 quadrillion. Coincidence? I think not.

On the Top 500 list from June, the K Computer took the number one spot out of the hands of China's Tianhe-1A system. The Tianhe-1A remains in the number two spot at the moment at 2.57 petaflops. Following in the number three spot is the Oak Ridge National Lab's Jaguar supercomputer. After that, the rest of the list looks pretty much the same as the last, with many companies holding the same spots as they previously did. According to TOP500 editor Erich Strohmaier, "This is the first time since we began publishing the list back in 1993 that the top 10 systems showed no turnover."

The K Computer, which is installed at the RIKEN Advanced Institute for Computational Science (AICS) in Kobe, Japan in partnership with Fujitsu, uses 705,024 SPARC64 processing cores. If you want to know just how many that is, it is more than the rest of the top five on the list combined. In addition to that, the K Computer uses 12.66 megawatts of power, four times more than its nearest competitor. This is also more than the 9.89 megawatts of power the computer recorded in June. However, despite these high numbers, the K Computer is still one of the most efficient supercomputers on the list, delivering 830 Mflops per watt.

The K Computer was installed in 672 racks back in June. An expansion of 800 cabinets allowed the 10 petaflop achievement to be accomplished. Just a week ago, Fujitsu announced the expansion possibilities of the K Computer as it could possibly grow to a theoretical 23 petaflops.

Aside from the rankings remaining unchanged, other characteristics evolved with the November 2011 list. The entry point for being on the Top 500 list is now at 50.9 teraflops with the combined performance across all 500 supercomputers being 74.2 petaflops, an increase from the 58.7 petaflops recorded in June. Gigabit Ethernet is still the most popular internal system interconnect, being used in 223 systems. However, InfinfBand use increased to 213 systems.

Average power consumption continued to rise with 29 systems on the list confirmed at using more than one megawatt of power. The most energy efficient supercomputers are BlueGene/Q with 2,029 Mflops per watt. IBM just filed a patent for a massive supercomputer that could potentially reach 107 petaflops. In total all of the systems that reported in on power consumption combined for more than 159 megawatts.

Source: Data Center Knowledge - K Computer Still the Most Powerful Supercomputer

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Japan Creates World's Fastest Supercomputer

When it comes to the most powerful supercomputers in the world, I don't think it is to anybody's great surprise that the most powerful one is located in Japan. This new Japanese supercomputer has just recently earned the top spot among all the supercomputers in the world with a performance that makes other supercomputers look like a TI-82.

Known as the "K Computer", this device is three times faster than its closest rival from China, which previously held the number one spot, according to Professor of Electrical Engineering and Computer Science at the University Tennessee at Knoxville Jack Dongarra. Dongarra also keeps the official rankings of computer performance.

The K Computer, which was created by Fujitsu and is located at the Riken Advanced Institute for Computational Science in Kobe, Japan, represents an incredible step forward in the realm of speed. This computer will also, more than likely, become a great sense of national pride for Japan, especially for computer scientists, who take the race to have the fastest computer in the world very seriously.

According to Dongarra, "It's a very impressive machine. It's a lot more powerful than the other computers." The latest ranking of the top 500 computers is determined with a simple mathematical equation. The computer who gets to take the top spot is able to make 8.2 quadrillion calculations per second which also calculates to 8.2 petaflops per second. The performance of the K Computer is the same as linking around 1 million desktops.

Supercomputers have many uses including earthquake simulations, climate modeling, nuclear research and weapons development and testing. Businesses also use supercomputers for oil exploration as well as rapid stock trading. However, building a supercomputer isn't cheap and it usually involves connecting thousands of small computers in a data center.

The K Computer is made up of 672 cabinets filled with system boards. The K Computer is considered to be energy-efficient even though it uses enough electricity to power around 10,000 homes at an estimated cost of $10 million annually. I'd hate to see the statistics for the non-energy-efficient ones. The lab that the K Computer calls home is planning on increasing the size of the computer to 800 cabinets which is predicted to raise the speed of the supercomputer that is already faster then its five closest competitors.

The K Computer received its name from the Japanese word "Kei" which translates to 10 quadrillion, the overall goal for the number of calculations the supercomputer should be able to perform. The previously leading supercomputer was China's Tianhe-1A which was located at the National Supercomputing Center in Tianjin, China. The Tianhe-1A was the first Chinese supercomputer to hit the top spot which acted as a beacon of the country's growing technological prowess.

The fastest supercomputer in the United States is located at the Oak Ridge National Laboratory in Oak Ridge, Tennessee. It placed third behind the K Computer and the Tianhe-1A. Countries in Asia have made sizable investments in supercomputing and currently dominate the upper echelon of the field. Japan and China alone hold four out of the top five spots.

However, when it comes to the top 10, the United States is still the leader, holding five of the top 10 spots. Japan's top supercomputer ranking marks the country's first since 2004. The United States and China were previously the only countries to hold that title. These rankings, issued every six months, are frequently changed and reflect just how fast computer power is advancing.

Source: The New York Times - Japanese 'K' Computer Is Ranked Most Powerful

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