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New Supercomputer System Begins Operations at the University of Tokyo's Information Technology Center

Enables world-class performance and energy efficiency using Fujitsu's PRIMEHPC FX10

Fujitsu Limited

Tokyo, April 02, 2012

Fujitsu today announced that it has completed construction of the new supercomputer, nicknamed Oakleaf-FX, for the Supercomputing Division of the University of Tokyo's Information Technology Center (SCD/ITC). The new system will begin operations from today.

The new Oakleaf-FX system, which employs Fujitsu's PRIMEHPC FX10 supercomputer, is one of the few petaflops-class(1) systems in the world and achieves high energy efficiency, as low as 1.4MW for overall system power consumption.

Oakleaf-FX has been installed at the Second Research Complex, Kashiwa Campus, The University of Tokyo, located in Kashiwa, Chiba Prefecture. In addition to contributing to SCD/ITC's cutting-edge research in a wide range of scientific and technological fields, the new system will be used in High-Performance Computing (HPC) education at both the undergraduate and graduate levels. As a result, it is expected to help train the next generation of leaders in the field of computational science.

Background to the Deployment of the New Supercomputer

SCD/ITC was established in 1965 as a large-scale computer center for shared use by researchers in Japan, and has been operating under its current name since 1999. The center has been contributing to advanced research using supercomputers in science and technology, and is used by more than 1,500 researchers inside and outside of the university. To meet the needs of an increasing number of diverse users and to handle large-scale applications, the University of Tokyo selected PRIMEHPC FX10 for its high compatibility with the K computer(2) supercomputer. Moreover, as the need is higher than ever for superior energy efficiency that can keep up with today's energy requirements, the PRIMEHPC FX10 is unique in its energy-efficiency performance, which was able to successfully meet SCD/ITC's requirement for system-wide power consumption of 1.4MW or less.

Overview of the New Oakleaf-FX System


The calculation nodes of the new Oakleaf-FX system use a PRIMEHPC FX10 configuration comprised of 4,800 nodes (50 racks).

Combining high performance, scalability, and reliability with superior energy efficiency, PRIMEHPC FX10 further enhances Fujitsu's technology used in the K computer, which has achieved the world's top-ranked performance(3).

For the supercomputer's peripheral systems, 74 PRIMERGY x86 servers, 234 ETERNUS storage systems, Technical Computing Suite(4), which is HPC middleware for peta-scale systems, and FEFS(5), a high-performance, highly reliable distributed file system that is a component of the Technical Computing Suite, have been deployed.

Oakleaf-FX is slated to be used in a wide range of scientific and technological areas, including earth science, astrophysics, seismology, weather modeling, materials science, energy, biology, hydrodynamics, and solid-state physics.

Oakleaf-FX Specifications
Compute Nodes PRIMEHPC FX10
Number of racks 50
Nodes 4,800
Theoretical Peak Performance 1.13 petaflops
Memory Capacity 150TB
Interconnect Tofu Interconnect (6D Mesh/Torus)
Log-in Nodes Management Servers 16 PRIMERGY RX200S6 servers
58 PRIMERGY RX300S6 servers
Local Files 150 ETERNUS DX80S2 storage units 1.1
petabytes (RAID5)
Shared Files 80 ETERNUS DX410S2 storage units
2.1 petabytes (RAID6)
Software Technical Computing Suite
File System FEFS
Compiler Fortran/C/C++
Numerical Computation Library SSL II (Scientific Subroutine Library II), C-SSL II, SSL II/MPI

Future Prospects

Through Oakleaf-FX, SCD/ITC will pursue a variety of advanced research and development initiatives led by researchers inside and outside of the university, as well as promote the training of the next generation of leaders in the field of computational science.

As a core facility of Japan's HPC industry, in addition to advancing SCD/ITC's efforts, the system will be used to develop application software and enhance user services in anticipation of future exascale computing systems.

With the new system, Fujitsu will also play a role in SCD/ITC's activities, while leveraging the company's extensive product lineup, robust service framework, and over thirty years of HPC support know-how to provide comprehensive support in all areas of R&D and analysis work.

Comment from Kengo Nakajima, Ph.D., Director, Supercomputing Division, Information Technology Center, The University of Tokyo

The PRIMEHPC FX10 supercomputer system (Oakleaf-FX) will contribute to advancements in various types of research and development activities by users from both academia and industry. Oakleaf-FX will be used for the HPC education program in the Graduate School of the University of Tokyo for future computational scientists. Oakleaf-FX will be operated so that priority is given to larger-scale jobs. Furthermore, a new project, called "Large-Scale HPC Challenge" is also starting. Members of a group whose proposal has been accepted can occupy all computing nodes (4,800 nodes, 1.13 PFLOPS) of the FX10 system for 24 hours. One proposal is selected per month.

  • [1] Petaflops

    Quadrillion floating-point operations per second.

  • [2] K computer

    The nickname RIKEN has been using for this next-generation supercomputer since July 2010.

  • [3] Top-ranked performance

    Ranked first on the 37th and 38th TOP500 lists.

  • [4] Technical Computing Suite

    Fujitsu's original HPC middleware, which includes system management and job operation management functions, FEFS, as well as a compiler and library, resulting in high execution performance for massively parallel applications.

  • [5] FEFS

    Fujitsu Exabyte File System. A high-performance distributed file system that enables sharing across 100,000 nodes.

About Fujitsu

Fujitsu is the leading Japanese information and communication technology (ICT) company offering a full range of technology products, solutions and services. Over 170,000 Fujitsu people support customers in more than 100 countries. We use our experience and the power of ICT to shape the future of society with our customers. Fujitsu Limited (TSE:6702) reported consolidated revenues of 4.5 trillion yen (US$55 billion) for the fiscal year ended March 31, 2011. For more information, please see

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Date: 02 April, 2012
City: Tokyo
Company: Fujitsu Limited, , , , , , , , , ,