The DEGIMA (DEstination for Gpu Intensive MAchine) is a high performance
computer cluster
A computer cluster is a set of computers that work together so that they can be viewed as a single system. Unlike grid computers, computer clusters have each node set to perform the same task, controlled and scheduled by software.
The comp ...
used for hierarchical
N-body simulation
In physics and astronomy, an ''N''-body simulation is a simulation of a dynamical system of particles, usually under the influence of physical forces, such as gravity (see ''n''-body problem for other applications). ''N''-body simulations ar ...
s at the Nagasaki Advanced Computing Center,
Nagasaki University
is a national university of Japan. Its nickname is ''Chōdai'' (). The main campus is located in Bunkyo-machi, Nagasaki City, Nagasaki Prefecture, Japan.
History
Nagasaki University was established in 1949 by incorporating several national ...
.
The system consists of a 144-node cluster of PCs connected via an
InfiniBand interconnect. Each node is composed of 2.66 GHz
Intel Core i7 920 processor, two
GeForce GTX295 graphics cards, 12 GB
DDR3-1333 memory and
Mellanox
Mellanox Technologies Ltd. ( he, מלאנוקס טכנולוגיות בע"מ) was an Israeli-American multinational supplier of computer networking products based on InfiniBand and Ethernet technology. Mellanox offered adapters, switches, softwa ...
MHES14-XTC SDR InfiniBand host adapter on
MSI X58 pro-E motherboard. Each graphics card has two GT200 GPU chips. As a whole, the system has 144
CPU
A central processing unit (CPU), also called a central processor, main processor or just processor, is the electronic circuitry that executes instructions comprising a computer program. The CPU performs basic arithmetic, logic, controlling, and ...
s and 576
GPUs. It runs astrophysical
N-body simulation
In physics and astronomy, an ''N''-body simulation is a simulation of a dynamical system of particles, usually under the influence of physical forces, such as gravity (see ''n''-body problem for other applications). ''N''-body simulations ar ...
s with over 3,000,000,000 particles using the Multiple-Walk parallel treecode. The system is noted for being highly cost and energy-efficient, having a peak performance of 111
TFLOPS
In computing, floating point operations per second (FLOPS, flops or flop/s) is a measure of computer performance, useful in fields of scientific computations that require floating-point calculations. For such cases, it is a more accurate meas ...
with an energy efficiency of 1376
MFLOPS/watt. The overall cost of the hardware was approximately US$500,000.
[Hamada T., Nitadori K. (2010) 190 TFlops astrophysical N-body simulation on a cluster of GPUs. In ''Proceedings of the 2010 ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis'' (SC '10). IEEE Computer Society, Washington, DC, USA, 1-9. ]
The name of the system is also derived from the name of a small artificial island called "
Dejima" in
Nagasaki
is the capital and the largest city of Nagasaki Prefecture on the island of Kyushu in Japan.
It became the sole port used for trade with the Portuguese and Dutch during the 16th through 19th centuries. The Hidden Christian Sites in the ...
.
See also
*
Supercomputing in Japan
Japan operates a number of centers for supercomputing which hold world records in speed, with the K computer becoming the world's fastest in June 2011. and Fugaku took the lead in June 2020, and furthered it, as of November 2020, to 3 times fas ...
*
Beowulf cluster
A Beowulf cluster is a computer cluster of what are normally identical, commodity-grade computers networked into a small local area network with libraries and programs installed which allow processing to be shared among them. The result is a hig ...
References
X86 supercomputers
MSI supercomputers
{{super-compu-stub