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News
- 1: 2025-12-04
- 2: 2025-10-31
- 3: 2025-10-17
1 - 2025-12-04
Scheduled Downtime
As announced earlier, DAIC will be unavailable from Thursday 11 December to Wednesday 17 December 2025 due to planned maintenance of the TU Delft datacenter.During this period, no jobs can run and all login nodes will be offline.
Maintenance overview
As part of this maintenance:
- Six GPU nodes will be removed from DAIC and migrated to a new environment for testing.
- The new environment will form the basis of the upcoming DAIC upgrade in Q1 2026.
Maintenance time line
Before the maintenance:
- DAIC can be used normally.
- Jobs with a requested end-time after Wednesday December 10 23:59 will remain pending until after the maintenance.
During the maintenance (December 11 00:00 - Wednesday December 17 23:59):
- No jobs can run; queued jobs will remain in the queue.
- All nodes, including the login nodes, will be unavailable
- All sessions on the login nodes will be lost.
- 6 GPU nodes will be removed from DAIC.
After the maintenance:
- DAIC can be used normally again.
- All partitions and GPU types will remain available.
- Jobs that were held previously because of the maintenance will remain on hold. To release your jobs:
- Update your Kerberos ticket with
auks -a, - Release the job(s) with
scontrol release <JobID>.
- Update your Kerberos ticket with
Upcoming new environment Q1 2026
To ensure the continuity of DAIC, DAIC will be migrated to a new environment, (with an up-to-date OS, scheduler and software stack) in the first quarter of 2026.
The migration will be phased, to allow for an as seamless as possible transition from the old to the new environment. The 6 GPU nodes (of different CPU & GPU types) will be migrated first, to prepare, test and fine-tune the new environment. When the test environment is fully operational, it will allow you to modify and test your jobs in the new environment. Then, the bulk of the DAIC nodes will be migrated to the new environment, and the old environment will be discontinued. More details will be provided when the new environment is ready for testing.
2 - 2025-10-31
DAIC is expected to be offline during the week [10-17] December due to planned work in TU Delft’s data centers.
Please plan around this week: The planned work will affect other ICT services too, such as TU Delft Project services, DelftBlue, and virtual servers, but the impact is not yet confirmed. Please assume your own share may be unavailable during this period.
This is part of ICT-wide maintainance at TU Delft. For more information, please check:
3 - 2025-10-17
It’s now possible to submit Slurm jobs directly from DAIC compute nodes.
This allows workflow managers such as Snakemake, Nextflow, or other orchestration tools to run smoothly without needing to return to the login node for each submission.
Important
Please submit jobs only through Slurm commands (sbatch, srun, salloc), not via background processes or recursive scripts, to ensure fair scheduling and stable operation.For most users, this means that standard HPC workflows will now function more smoothly on DAIC.