Usage summary of JSS in FY2021

JAXA Supercomputer System Annual Report February 2021-January 2022

■ Operation of JSS3: April 1, 2021-March 31, 2022
* For specifications of JSS3, refer to Supplement 1.

Job filling rate trends

job_filling_rate1 Fig.1: JSS2/JSS3 job filling rate

Usage trends of JSS3

correlation_between Fig.2: Correlation between the number
of parallels and core time per job

Table.1: Percent of jobs by number
of parallels

percent_of_jobs

JSS usage trends

Trends of JSS usage frame

The fields of use are classified into five frameworks, and utilization rate guarantees and job execution priority control suitable for each framework are set, effectively maximizing R&D results.

Table. 2: Overview of JSS usage framework
framework	overview	utilization rate guarantees
Specified Project Use	Strategic use of JAXA, such as project requests	50%
General Use	Use of general R&D	–
Small scale Use	Small-scale calculations of experimental or exploratory research ( No need to set business code )	4%
JSS Inter-University Research	Use as an inter-university facility	5%
Facility Utilization	Paid use by external organizations such as the private sector (refer to Supplement 2) There is a free trial use system too	10%

annual_transition_of_uti_a
note: TOKI-SORA is subject to aggregation.
Some reports belong to multiple framework.

Fig.3: Annual transition of utilization rate by JSS usage framework

Usage of Specified Project Use for FY2021

ration_by_usage Fig.4: Ratio by usage framework for FY2021

For the first time, FY2021 exceeded the rule of ” Specified Project Use ratio of 50% or less” that was started in FY2016 to prevent general usage from being overwhelmed.

Table.3: Specified Project Use ratio up to FY2020
FY2016	FY2017	FY2018	FY2019	FY2020
19%	39%	42%	47%	50%

Trend of usage by department

In the R & D department, basic research is included, but there is also project support in the space transportation technology department, and the total of the two departments in 2021 has reached about 40% of the total of JSS3. The aviation technology sector accounts for more than 40% each year, and the use of JSS extends from the aviation sector to the space sector.
annual_transition_of_uti_b
note：TOKI-SORA is subject to aggregation.

Fig. 5: Annual transition of utilization rate by JSS user department

Visualization technology

The visualization technique is essential to analyze the calculation results quickly and accurately. Supercomputer Division prepares various visualization tools on JSS3/TOKI-RURI so that all users can use a suitable application to visualize their research.

● Large-scale visualization
If users cannot visualize in the normal visualization environment due to the large scale of calculation results, the visualization team gives proper advice on how to visualize. Two complicated visualization samples are shown as follows.

航空機解析コア技術開発 Fig.6: Core technology to innovate
aircraft design and operation

H3ロケットの打ち上げ時の射場周りのシミュレーション Fig.7: Aero-acoustic simulation of H3
launch vehicle at lift off

● New visualization technology
The visualization team is promoting to develop the 3D visualization technology, such as using 3D printers and wearable devices. Using these technologies, researchers can understand the simulation results as 3D models. It helps them make sense of the complex flow fields around the aircraft and spacecraft intuitively, which they could not grasp before.

透明樹脂を使った3Dプリンタモデル Fig.8: 3D printer model with
transparent resin (Flow field
around the landing gear)

Fig.9: 3D printer model with transparent resin
(Numerical simulation of buffet)

MR(Mixed Reality) technique can display 3D holograms of simulation results with the special wearable device. Researchers wearing this device can see and discuss the same simulation results with each other, even if they are in different locations.

HoloLens2風車 Fig.10: Display of 3D simulation result using HoloLens2
(Simulation of two wind turbines)

Supplement: JSS3 Facility Utilization service fee

Table. 5: Price List
Basic fee	\11,926 / Month
Node fee	SORA　\0.49393 ／（core・sec） RURI(ST)　\1.6958 ／（core・sec） RURI(GP)　\7.4453 ／（core・sec） RURI(XM)　\27.568 ／（core・sec） RURI(LM)　\4.0524 ／（core・sec） RURI(TST)　\1.6958 ／（core・sec） TRURI(TGP)　\7.4453 ／（core・sec） TRURI(TLM) 　\4.0524 ／（core・sec）（ The SORA system is charged for usage time exceeding 500 (node・hour). )
File fee	\0.14220 ／（GB・Month）（ Allotted capacity over 500 (GB・month) is subject to billing. In addition,the capacity will be up to the amount approved by JAXA.）
Archiver fee	\0.16302 ／（GB・Month） (However,the maximum is 400TB.)
Management fee	9.1% of direct expenses

*Separately, the statutory consumption tax amount will be added at the time of billing.
*If a fraction of less than 1 yen is generated when calculating the burden amount, the fractional amount shall be rounded down for each calculated amount.