Project support using numerical simulation

JAXA Supercomputer System Annual Report April 2017-March 2018

Report Number: R17EG3211

Subject Category: Research and Development

Responsible Representative: Eiji Shima, Research and Development Directorate, Reserch Unit III
Contact Information: Hideyo Negishi negishi.hideyo@jaxa.jp
Members: Takayuki Ito, Ryoji Takaki, Seiji Tsutsumi, Hiroyuki Ito, Taro Shimizu, Junya Aono, Takanori Haga, Yuhi Morii, Masaharu Abe, Masayuki Kakehi, Mikiroh Motoe, Manabu Hisida, Hideyo Negishi, Yoichi Ohnishi, Miki Nishimoto, Yu Daimon, Ashvin Hosangadi, Masaaki Ino, Osamu Fukasawa, Shinji Ohno, Andrea Zambon, Takenori Nakajima, YUKA Akimura, Takashi Amemiya, Hironori Fujiwara, Hiroumi Tani, Takuya Iimura, Keiichiro Fujimoto, Tetsufumi Ohmaru, AKIKO Kotani, Taroh Fukuda, Mayu Matsumoto, Masashi Toyama, Hiroaki Amakawa, Katsuyuki Ishibashi, Kei Nishimura, Daiki Muto, Issei Masaie, Shun Fujimoto, Susumu Sato, Satoshi Ukai

Abstract

Utilize the simulation technology of Reserch Unit III to deal with the technical problem solving in current JAXA project, and respond to the request for the project concerning issue. In addition, it realizes “added value (efficiency improvement, high reliability, cost / period reduction, ripple effect, etc.)” unique to numerical simulation technology.

Reference URL

Please refer to ‘Research on software, computational engineering, and verification technology | JAXA｜Research and Development Directorate‘.

Reasons for using JSS2

In order to respond timely to project requirements, it is necessary to simulate complex geometries of actual spacecraft and to analyze a large number of conditions in a short period.

Achievements of the Year

With regard to H3, SLIM, HTV-X projects, evaluation of design and risks as well as studies for improvement were carried out by making full use of the simulation technology of Reserch Unit III and JSS2.

Publications

■ URLs for the Research Results on the Web

http://www.kenkai.jaxa.jp/eng/research/software/software.html

Usage of JSS2

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: N/A
Number of Processes: 16 – 32
Elapsed Time per Case: 30.00 hours

Resources Used

Fraction of Usage in Total Resources*1(%): 1.17

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

Computational Resources
System Name	Amount of Core Time (core x hours)	Fraction of Usage*2(%)
SORA-MA	5,738,372.24	0.75
SORA-PP	141,174.57	1.77
SORA-LM	0.00	0.00
SORA-TPP	1,035,782.58	30.77

File System Resources
File System Name	Storage Assigned (GiB)	Fraction of Usage*2(%)
/home	6,790.95	4.70
/data	111,422.26	2.06
/ltmp	21,380.23	1.61

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	111.76	4.81

*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).

*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.