KEK Supercomputer System

The KEK Supercomputer System provides powerful computational resources to numerical simulations in theoretical elementary particle and nuclear physics, as well as simulations in condensed matter physics and accelerator simulations.

Present KEK Supercomputer System (KEKSC) is composed of two computing servers: Hitachi SR 16000 model M1 (total peak performance of 54.9 TFlops, total memory 14 TB) and IBM Blue Gene/Q (6 racks, 1.258 PFlops, 96 TB). Here Flops means floating point operation per second and measures arithmetic performance, and T and P means 1012 and 1015, respectively. In addition to the high performance arithmetic operation units, these machines have high speed network among processor cores for exchange of data. SR16000 is composed of 16 nodes, each consists of 32 processor cores sharing memory. A compiler with automatic parallelization function enables high performance execution of a wide range of applications. On the other hand, Blue Gene/Q is suitable for large-scale parallel applications. Each rack is composed of 1024 nodes and each node consists of 16 processor cores.

A major portion of KEKSC's computing resources is used for studies of the strong interaction, the elementary force among quarks. The previous KEKSC provided many important results. For example, it verified QCD vacuum structure, a state in which quarks and antiquarks condensed, which Prof. Yoichiro Nambu proposed. Another important result was the calculation of force between nucleons (protons and neutrons) based on the fundamental interactions of their component quarks. The current system is also expected to produce results, such as providing precise scattering process calculations of quarks, which are essential for Large Hadron Collider (LHC) and next generation of B Factory experiments. To share the large amount of data generated in simulations, KEKSC is connected to a data grid system called `Japan Lattice Data Grid'.

KEKSC is also used for other areas of elementary particle and nuclear physics, as well as condensed matter physics and accelerator simulations. Making use of large computing power of the present system, it is expected to conduct many important works that extend the frontier of accelerator science.