2025.07.01Periodic maintenance
According to the following schedule, we are planning to perform scheduled maintenance on each system.
We apologize for any inconvenience this may cause our users.
Supercomputer and Application Server
Schedule: 9:00 – 13:00, Jul. 22, Nov. 17, 2025, Jan. 19, 2026.
During the maintenance, there will be a possibility that connection to these servers will be failed and that a connected session will be broken.
Batch jobs that will be queued or running on Supercomputer will not be affected by the maintenance.
Please note that the interactive jobs will be terminated forcibly.
Cloud Storage (Nextcloud)
Schedule: 9:00 – 13:00, Jul. 23, Nov. 18, 2025, Jan. 20, 2026.
During the maintenance, you will not have access to your data. The work on Nov.18 has been canceled.
Research Cloud
Schedule: 9:00 – 13:00, Jul. 24, Nov. 19, 2025, Jan. 21, 2026.
Service is not available during the maintenance.
2025.12.23[Restored] Regarding the Failure of Supercomputer Computing Nodes (23/12/2025)
At 10:00 on 23 December 2025, an issue with the supercomputer’s cooling system caused a failure, resulting in downtime for some compute nodes.
Due to this impact, we have also temporarily suspended the execution of new jobs on all compute nodes (both exclusive and shared).
We are currently investigating the situation, but the estimated restoration time is currently unknown.
We will provide an update as soon as there is progress.
We sincerely apologise for any inconvenience caused to our users.
We kindly ask for your patience until the system is restored.
(Updated 2025/12/23 13:25)
Service has been restored, and the suspension of job execution was lifted at 13:15.
We will contact users whose jobs were forcibly terminated due to this outage separately.
We sincerely apologize for any inconvenience caused to users.
2025.11.17[Finished] Notice Regarding FieldView and Pointwise Maintenance
Due to license renewal work for FieldView and Pointwise, these applications will be unavailable during the following period:
Service stop: Monday, December 1, 2025, 0:00 AM to 5:00 PM
We apologize for any inconvenience this may cause and appreciate your understanding.
2025.08.12[Finished] Temporary suspension of service due to the planned power outage
Due to the planned power outage in Hokkaido University and related maintenance, our service will stop as follows. Thank you for your understanding.
Supercomputer and Application server
Service stop: Sep. 12th (Fri), 17:00 – Sep. 17th (Wed), 13:00
- During the above period, connection to Supercomputer and Application server will be unavailable (including Supercomputer File System).
- If it is predicted that a submitted job will not be completed by the service stop, the job will be queued (not start) and start after the service restarting.
- Application software that needs license activation will be unavailable during the above service stop period.
Research cloud
Service stop: Sep. 12th (Fri), 17:00 – Sep. 17th (Wed), 13:00
- Pods will be deleted when the Research Cloud system is shut down.
- Data within Pods will also be lost upon deletion. Therefore, please ensure that necessary data is stored in Persistent Volumes.
- After the service is restored, Pods using Deployments/StatefulSets will automatically restart. However, Pods not utilizing these will require recreation.
Nextcloud
Service stop: Sep. 11th (Thu), 17:00 – Sep. 16th (Tue), 9:00
User portal
Service stop: Sep. 11th (Thu), 17:00 – Sep. 17th (Wed), 13:00
- Since you will not be able to log in to the portal during this time, please complete any necessary operations, such as registering an SSH public key or downloading applications, before the service is stopped.
2025.07.23Nextcloud introduced two-factor authentication (July 23 ~)
The cloud storage service (Nextcloud) introduced two-factor authentication (TOTP) of login for security enhancement after periodic maintenance on Wednesday, July 23, 2025.
The login process and the configuration of client applications have been modified from the previous methods due to the implementation of two-factor authentication. Please take note.
One-time password (authentication code) by Authenticator is required when logging in to Nextcloud
When you enter your ID/password at the first login, you will be required to register the Authenticator app, so please prepare the Authenticator app for your smartphone in advance.
* After logging in, please create backup codes and store them in a safe place in case the Authenticator becomes unavailable. You can generate the backup codes by clicking the “Generate backup codes” button in the security menu of the settings after logging in to Nextcloud.
Authentication with “App Password” is necessary for apps that are linked to Nextcloud
When you work with a client app or GakuNin RDM, you need to authenticate with an app password created by Nextcloud.
You can create the app password by clicking the “Create new app password” button in the security menu of the settings after logging in to Nextcloud.
* You can create multiple app passwords, and you can disable them individually from Nextcloud. If you share the same app password with multiple devices, you will need to reconfigure all of them in case of loss, theft, etc., therefore it is recommended to create and set it individually for each device.
2025.04.23[Completed] Notification of Nextcloud Maintenance on April 30
Maintenance of cloud storage (Nextcloud) will be conducted during the following period.
Please note that Nextcloud will be inaccessible during this period.
* Maintenance Period
Wednesday, April 30, 2025, 9:00 AM – 5:00 PM 6:00 PM JST (Completed)
We sincerely apologize for the inconvenience and appreciate your understanding.