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Project support activity using numerical simulation

JAXA Supercomputer System Annual Report April 2020-March 2021

Report Number: R20EG3211

Subject Category: Research and Development

PDF available here

  • Responsible Representative: Taro Shimizu, Research and Development Directorate, Research Unit III
  • Contact Information: Satoshi Ukai(ukai.satoshi@jaxa.jp)
  • Members: Takayuki Ito, Ryoji Takaki, Seiji Tsutsumi, Hiroyuki Ito, Taro Shimizu, Junya Aono, Takanori Haga, Masaharu Abe, Masayuki Kakehi, Manabu Hisida, Hideyo Negishi, Yoichi Ohnishi, Miki Nishimoto, Yu Daimon, Ashvin Hosangadi, Osamu Fukasawa, Shinji Ohno, Andrea Zambon, Takenori Nakajima, Takashi Amemiya, Hironori Fujiwara, Keiichiro Fujimoto, Taroh Fukuda, Masashi Toyama, Kei Nishimura, Daiki Muto, Satoshi Ukai, Hidenao Takahashi, Kota Akai, Rika Yamada, Kohki Tao, Tetsuji Ogawa, Taiki Naitoh, Himeko Yamamoto, Yuuichi Kunishima, Akimitsu Terunuma, Masaru Kusano, Tomoya Kusaki, Shohta Sutoh

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

Reasons and benefits of using JAXA Supercomputer System

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/JSS3.

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: FLAT
  • Number of Processes: 100 – 400
  • Elapsed Time per Case: 100 Hour(s)

Resources Used(JSS2)

 

Fraction of Usage in Total Resources*1(%): 0.53

 

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 1,243,280.40 0.24
SORA-PP 83,576.72 0.66
SORA-LM 13,136.93 7.71
SORA-TPP 81,693.43 7.71

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 9,660.14 8.85
/data 149,050.69 2.88
/ltmp 21,610.56 1.84

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 146.59 4.85

*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.

 

Resources Used(JSS3)

 

Fraction of Usage in Total Resources*1(%): 1.04

 

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name Amount of Core Time
(core x hours)
Fraction of Usage*2(%)
TOKI-SORA 4,050,464.24 0.87
TOKI-RURI 132,231.58 0.76
TOKI-TRURI 47,716.11 3.85

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 14,285.28 9.79
/data 264,047.14 4.42
/ssd 9,488.52 4.95

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 146.59 4.85

*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.

JAXA Supercomputer System Annual Report April 2020-March 2021