Introduction The Xtra Computing Server provides computational resources (GPU, CPU, memory, and storage) primarily to support research and academic activities. Users must follow the guidelines outlined in this document to ensure fair resource allocation and maintain a productive computing environment.
Important
Resources are intended for the use of Xtra Computing Group only.
Warning
Any misuse may result in the termination of your computing tasks.
Users must apply via the provided registration form: https://forms.gle/Wf8qbNeuSPS2ia8u6
| Event | Action | Notes |
|---|---|---|
| Account Expiration | Account Frozen | You cannot log in. Contact admin within 6 months to unfreeze. |
| 6 months post-expiration | Account Removal | Data preserved temporarily in cold-storage1; integrity not guaranteed. |
| 12 months post-expiration | Data Deletion | Files permanently deleted; recovery impossible. |
All notifications and alerts are communicated exclusively via your registered email address.
Caution
If your account remains expired, your data may be removed after 6 months and permanently deleted after 12 months.
Unfreezing Your Account To request reactivation after account freezing, contact the administrator. Reactivation requests are typically processed within 1-2 business days.
| User Category | home Disk Quota |
|---|---|
| PhD Students | 512 GiB |
| Others | 256 GiB |
Additional disk space requests are possible via email to the administrator and are considered based on project justification and resource availability.
For hosting large datasets, please contact the administrator. Dataset hosting will not count against your quota.
Data integrity is not guaranteed. Users must perform regular backups. Weekly backups are recommended, with more frequent backups suggested for critical data. For critical data requiring higher reliability, use the /shared/hdd or /shared/ssd directory protected by RAIDZ2 (resilient to two drive failures).
Important
Backup responsibility belongs to the user. Always maintain restorable checkpoints for critical work.
By using the servers, users consent to file reviews by administrators to ensure compliance. Reviews typically occur in response to specific incidents, abnormal resource usage, or during security audits. We never do routine or random inspections for no reason.
Do not store private or sensitive files (e.g., personal photos, videos, confidential documents).
Disk usage is tracked monthly (GB/month) across all servers, attributed uniquely per user. High usage users may be contacted to reduce disk usage.
We aim to ensure that all users have equal and convenient access to GPU resources. Our system is designed to be as unrestricted as possible while maintaining fairness among users.
| User Category | GPUs Allowed Without Application |
|---|---|
| all_user | 2 GPUs freely |
Users can utilize GPUs freely within their quota and may also exceed their quota when additional GPUs are available and not in use by others.
If you have compute-intensive tasks, please consider using the HACC Cluster or the SoC Cluster, which are better suited for high-performance computing needs.
You can use more than 2 GPUs without application.
To ensure fair and efficient utilization of our shared GPU infrastructure, we are introducing the following resource management policy effective immediately:
Any process that:
- Occupies large GPU memory, and
- Maintains less than 1% GPU utilization continuously for 10 minutes
will be automatically terminated by the system.
Warning
Low-utilization, high-memory GPU jobs are subject to automatic termination.
Users are fully responsible for monitoring their jobs. Any loss of progress, data, or runtime caused by automatic termination under this policy is the responsibility of the job owner.
Please ensure that your scripts:
- Do not hold GPU memory while idle
- Properly release resources when inactive
- Avoid prolonged zero-utilization states
Caution
Progress or data loss caused by policy-triggered termination is the user’s responsibility.
Temporary exceptions may be granted on a case-by-case basis depending on the application. If your workload legitimately requires GPU memory residency with low or zero utilization, please contact the administrator in advance with justification.
Thank you for your cooperation.
To reserve GPUs, please fill out the reservation form: Reservation Form.
Currently, we do not limit the CPU and memory usage of our users. However, excessive CPU or memory usage negatively impacting others, may result in penalties.
Excessive usage is determined based on its impact on system stability
- Out-of-memory (OOM) errors that prevent other users from accessing the server (e.g., making it impossible to SSH in).
- Any behavior that requires administrator intervention to restore normal operations.
| Offense Times | Action |
|---|---|
| 1st | Notification |
| 2nd | Warning |
| 3rd | Account frozen for 2 day |
| 4th | Account frozen for 2 weeks |
| 5th | Permanent ban from all infrastructures |
Xtra Computing Server administrators and affiliates are not responsible for data loss, damages, or inconveniences arising from hardware failures, software issues, or user actions. Users assume full responsibility for data backups and accept resources as-is without warranty.
Caution
Service is provided as-is without warranty. Keep independent backups and recovery plans.
For detailed administrator boundaries, see: Admin Liability.
Last update: March 3, 2026
Footnotes
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Cold storage refers to a type of data storage designed for infrequently accessed data. Since moving data in and out of cold storage takes a long time, it is mainly used for archiving or backup purposes rather than for data that needs to be accessed frequently. ↩