Supercomputing Division, Information Technology Center, The University Tokyo

General FAQ

Overview

What kind of computers are available for use at the Center?
The Center carries out large-scale computational services through the following supercomputer systems. For details, please refer to “Introduction to Our Supercomputer Systems.”

Oakforest-PACS Supercomputer System
(Manycore-based Large-scale Supercomputer System)
Fujitsu PRIMERGY CX600M1/CX1640M1 (OS: RedHat Enterprise Linux)

Reedbush Supercomputer System (Reedbush-U)
(Integrated Supercomputer System for Data Analyses & Scientific Simulations)
SGI Rackable C2112-4GP3 (OS: RedHat Enterprise Linux)

Reedbush Supercomputer System (Reedbush-H)
(Integrated Supercomputer System for Data Analyses & Scientific Simulations)
SGI Rackable C1102-GP8 (OS: RedHat Enterprise Linux)

Reedbush Supercomputer System (Reedbush-L)
(Integrated Supercomputer System for Data Analyses & Scientific Simulations)
SGI Rackable C1102-GP8 (OS: RedHat Enterprise Linux)

For details on system information, etc., please refer to the webpages of the respective supercomputer systems.

Can I try out the supercomputer systems before applying for use?
The Information Technology Center, the University of Tokyo, offers a Trial Use Course that allows interested parties to try out the supercomputers for a fixed period of time at a comparatively lower cost than usual. The trial use course consists of “free trial use course,” which allows users from private corporations to try out the computer systems for free, and “paying trial use course,” which allows users from private corporations, universities, and public organizations to try out the computer systems at a low cost. After getting a sense of using the supercomputer systems through the trial use course, please consider applying for regular use.
The flow for trial use course differs depending on the user and the course of use they apply for. For details, please refer to the Flow of Use.
Flow of Use (trail use course)

▲ Return to the top of the General FAQ

Application for use

Are there any restrictions on the purpose of use, eligibility, etc. in order to use the supercomputer systems?
The supercomputer systems are available for use to faculty and students of universities, as well as researchers, for the purpose of contributing to academic research, education, and social contribution. For details, please refer to Eligibility for Use.
Are there any points that foreign nationals should take note of if they wish to use the supercomputers?
There are cases where it is necessary for researchers who are foreign nationals and international students, etc. to obtain approval from the Minister of Economy, Trade and Industry when they wish to use the supercomputers. For details, please refer to “Use of supercomputers by foreign nationals and those residing abroad.”
What should I do if I wish to apply to use the supercomputer systems? Where should I submit inquiries to?
To apply for use, please fill in the necessary fields in the application form and submit it to the Research Support Team, Information Strategy Group, Information Systems Department, The University of Tokyo. For details on where to submit the application or raise inquiries, please refer to “Application for use.”
I wish to apply for continued use of the supercomputer systems. As the confirmation of the budget takes place after the deadline for submission, I will not be able to submit the application on time. What should I do?
If you expect to be able to receive the budget, please submit the application form before the submission deadline. For reasons related to the allocation of computational resources to applicants, there may be cases where we are unable to accept applications after the deadline. Please contact us as soon as possible if you need to withdraw an application for unavoidable reasons.
I wish to apply for continued use of the supercomputer systems. What are the necessary procedures to be completed if I wish to make changes to the users and resources that are currently registered?
To make changes to the users

1. To make changes to users who are currently registered
In the field left of the user names provided in the application forms for the supercomputer systems (continued use), which contain the registration details for this fiscal year, check the applicable boxes [□ Continuation □ Cancellation (Delete), □ Change (Please correct the designation, affiliation, etc. in red ink)] and submit the form.

2. To add new users
- To add new users, please fill in the form on the third page of the application form for making changes to the group course (group course users), and enclose it.
- Addition of new users is possible even during use of the system after April. Please fill in and submit the application form for use (changes).

To make changes to the resources applied for

Please fill in the fields for application for the next fiscal year.
However, please note that there may be cases where we are not able to provide the required number of nodes, etc., or where we may have to reject the application for use due to the application situation.
I have forgotten the necessary procedures for applying for continued use. What should I do?
After the deadline has passed for application for continued use, the user will be required to submit a new application for use. Files that have been in use will be deleted. Even in the case of a new application, please note that it will not be possible to copy the files used previously.
After submitting the application for use, approximately how long will it take for the application to be approved?
If use is approved, a notification of user registration will be sent to the applicant about one week after the application has been processed. If the notification of user registration is not sent out more than two weeks after the submission of the application, or if there are any errors in the contents of the notification of user registration, please contact the Research Support Team (03-5841-2717).
If use from April of the next fiscal year has been approved, the notification of user registration will be sent out at the end of March of the year.
Could you tell me more about the cost of use?
Please refer to the page on Application for Use/Cost of Use.
I would like to request for a quotation of the cost of use to be issued for the use of the supercomputer system.
The Center does not issue quotations. However, the specific cost of use is listed in the appendix of the Terms of Use for Supercomputer Systems of the Information Technology Center, the University of Tokyo, so please refer to the Terms of Use for details.
I would like to change the billing month for the cost of use. Could you tell me how to do that?
Invoices are issued for the cost of use as a lump sum at the beginning of July, October, January, or March, corresponding to the month that you begin using the supercomputer. If you wish to change the billing month, please consult with the Research Support Team, Information Strategy Group, Information Systems Department, The University of Tokyo (Email address for inquiries) before submitting the application for use.

▲ Return to the top of the General FAQ

Connecting to the supercomputers

I cannot connect to the supercomputer through telnet. I would like to transfer a file, but cannot connect through the ftp.
To enhance security, connections through telnet and ftp are prohibited. To connect to the system, please use ssh or scp.
Could you tell me the IP address of the supercomputer?
The IP addresses of the supercomputers are not disclosed to the public. Please access using the host name, through the “ofp.jcahpc.jp” DNS (Domain Name System). For those who are currently unable to access through DNS and who have specified a direct IP address, please consult with the network administrator in charge, and establish an environment that allows you to refer to the DNS and access using a host name.
What is the key used to authenticate?
It authenticates the holder of the private key.
What is the intention behind the key authentication method?
It is used to enhance security and convenience.
When I attempt to connect through SSH, the following message is displayed.
ssh ofp.jcahpc.jp -l [User number]
Permission denied (publickey). 

The following scenarios are possible.

1. Services may currently be suspended (system shutdown). Please check the Top Page of the Center’s website, or refer to the Operational Schedule.

2. It is possible that the public key has not been registered successfully. Please inquire via the link below for consultation and inquiries on system use.

3. A problem may have occurred with the system. Please check for any information on system failures, etc. on the TOP Page of the Center’s website. You may also inquire via the link below for program consultation.

Webpage for consultation and inquiries on system use

The following message is displayed when I register for the public key. What should I do?
“The key is incorrect. Please check that you have copied and pasted the public key correctly.”
It is possible that the key you are attempting to register has not been set correctly.


1. The public key contains invalid characters (half-width spaces).
2. You have not copied the entire public key, and pasted only a part of the complete key.


On the Macintosh terminal, a problem sometimes occurs where half-width spaces that are not used in SSH public keys appear when the character string (public key) is displayed using “less,” and is then copied and pasted. Hence, please copy and paste the character string (public key) that is output through “cat” on the terminal, as shown below, and try to register the public key again.

% cat ~/.ssh/id_rsa.pub
Is it possible to register two or more SSH keys?
On the key registration system for the Oakforest-PACS, FX10 Supercomputer System, only one key can be registered as the original key will be overwritten while the additional key will be registered. However, if you edit “~/.ssh/authorized_keys” manually, it is also possible to register two or more keys.
The key registration system of the Reedbush Supercomputer System allows for the registration of two or more keys.
Are there any restrictions on the use of login nodes?
Parallel programs cannot be executed. Please also refrain from carrying out computations and heavy debugging processes.
I have forgotten my password for accessing the key registration page.
Please bring your notification of user registration and a personal identity document to the Center. Alternatively, you may contact the reception (Email address for inquiries). Please note that we are unable to respond to inquiries about passwords via the phone, fax, or e-mail.

▲ Return to the top of the General FAQ

Service hours, etc.

Could you tell me the times when computer services are provided?
In principle, services are available 24 hours of the day. However, services are suspended during the month-end processing period. Month-end processing is carried out on the last Friday of every month in principle, or on the day before that if the last Friday coincides with a holiday. For the operational schedule, please refer to the messages that are displayed during login, the Supercomputing News, and the Operational Schedule.
As the systems are unattended after 5:00 p.m. on weekdays, and on holidays (weekends and holidays), in the event that services are suspended due to system failure or other reasons, you may not be able to reach anyone with regard to system recovery, public relations, or other forms of contact. Your kind understanding is much appreciated.
Please tell me what the operational schedule is for the year.
Please refer to this page for the yearly operational schedule (provisional). In the event of an emergency system suspension, etc., the latest information will be provided through the notifications on the Top Page of this website or the messages that are displayed when you login. Please also refer to these notifications.

▲ Return to the top of the General FAQ

Manual

I would like to browse the manuals for the compilers, etc.
For manuals on languages and libraries, you can refer to the user support portal or the respective dedicated webpages for users.


User support portal for the Oakforest-PACS Supercomputer System
User support portal for the Reedbush Supercomputer System

Are printed and bound manuals available for browsing?
No. Please refer to the aforementioned webpages.
I would like to read past issues of the Supercomputing News and Center News.
The Supercomputing News is published on this webpage. To browse and obtain the printed copy, please contact the reception (Email address for inquiries). (Limited hard copies are available. We apologize if they are out of stock.)

▲ Return to the top of the General FAQ

User support

I would like to consult with someone on the use of the supercomputer systems, such as the programs, etc. What should I do?
The Center accepts inquiries about the use of the supercomputer systems via e-mail or through the website. Different e-mail addresses have been created for different categories of inquiries. For details, please refer to “Inquiries.”
I would like to ask the Center to help me install a program.
The Center does not act on behalf of users in the installation of programs or the work required to do so (e.g. rewriting “makefile”). Your kind understanding is much appreciated.

Registration of the results of research

I would like to register the results of my research. How can I do that?
You can register the results of your research from the Center’s webpage (https://regist.cc.u-tokyo.ac.jp/ar/).
Can I write the report of my research results in English?
You can write the report in English.
I would like to acknowledge the use of the Center’s supercomputers in my English paper, etc. Are there any examples of how to write the acknowledgements in English?
If you are writing a report on the results of your research in an English paper, etc., please acknowledge the use of the Center’s supercomputers through acknowledgements such as those shown below.

Example of English acknowledgement for regular use (Use of the Oakforest-PACS Supercomputer System)
This research was conducted using the Fujitsu PRIMERGY CX600M1/CX1640M1 (Oakforest-PACS) in the Information Technology Center, The University of Tokyo.
Example of English acknowledgement for regular use (Use of the Reedbush Supercomputer System)
This research was conducted using the SGI Rackable C2112-4GP3/C1102-GP8 (Reedbush-U/H/L) in the Information Technology Center, The University of Tokyo.
Example of English acknowledgement for use of the Large-Scale HPC Challenge
English title of this program
"Large-scale HPC Challenge" Project, Information Technology Center, The University of Tokyo.
Example of English acknowledgement (Use of the Oakforest-PACS Supercomputer System)
Computational resource of Fujitsu PRIMERGY CX600M1/CX1640M1(Oakforest-PACS) was awarded by "Large-scale HPC Challenge" Project, Joint Center for Advanced High Performance Computing (JCAHPC).
Example of English acknowledgement (Use of the Reedbush Supercomputer System)
Computational resource of SGI Rackable C1102-GP8(Reedbush-H) was awarded by "Large-scale HPC Challenge" Project, Information Technology Center, The University of Tokyo.
Example of English acknowledgement for use by young researchers/ women researchers
English title of this program
Initiative on Promotion of Supercomputing for Young or Women Researchers,Supercomputing Division, Information Technology Center, The University of Tokyo.
Example of English acknowledgement
This research is partially supported by Initiative on Promotion of Supercomputing for Young or Women Researchers,Supercomputing Division, Information Technology Center, The University of Tokyo.

▲ Return to the top of the General FAQ