NAISS Arrhenius Disk / SENS Storage (Sweden) — 25 PB and 10 PB project storage, applied in GiB
- Free allowance
- Project storage is applied for in GiB through SUPR, with generous upper limits: Arrhenius Disk shows 'Upper Limit 50,000', 'Default Storage 250', 'Available 4,000,000' (GiB — so 50,000 GiB ≈ 48.8 TiB ceiling, 250 GiB default); Klemming 'Upper Limit 100,000' with 'Available 5,850,000' GiB.
- Verdict
- caveatusable, with a named limit or an unprobed read path
- Cost
- free tier
- Identity
- institution?placeholder, not evidence; card unknown, phone unknown
- Binding limit
- per-object-cap48.8 TiB ceiling
- Evidence
- reported4 sources; a third party said so
- Freshness
- stale on 2026-11-05checked 2026-10-21 (inherited); stale on 2026-11-05
| Free tier | Project storage is applied for in GiB through SUPR, with generous upper limits: Arrhenius Disk shows 'Upper Limit 50,000', 'Default Storage 250', 'Available 4,000,000' (GiB — so 50,000 GiB ≈ 48.8 TiB ceiling, 250 GiB default); Klemming 'Upper Limit 100,000' with 'Available 5,850,000' GiB. Arrhenius SENS Storage is a 10 PB system for sensitive data, 'only available as when applying for a related compute resource'. unit GiB; metered on stored-bytes |
|---|---|
| Price | none stated |
| Limits |
per-object-cap: not applicable (POSIX/Lustre). Retention: 'There is no backup of Arrhenius Disk' and storage is tied to the project; NAISS Large requires prior PI status on a Medium project. request-rate: not published. Gate: heavy — 'you must be a scientist in Swedish academia, at least at the level of assistant professor' for Medium, PhD student + 20% appointment for Small, and Large requires 'an appointment of at least 60 percent at a Swedish university'. |
| Identity | institution (inferred, not read) not published |
| Egress | Free national e-infrastructure; no egress meter documented. |
| Per-object cap | 48.8 TiB ceiling (53656167435468 bytes) |
| Retention | not stated |
| Interface | s3, sftp, scp, rsync sftp |
| Tooling | Lustre/POSIX on Arrhenius Disk (rsync/scp/sftp from a login node), no published S3 endpoint for the Disk resource. SUPR is the application portal. |
| Composes with | Small allocations are reviewed WEEKLY — 'Proposals are reviewed weekly throughout the year' — so a Swedish-affiliated PI can iterate to the ceiling in weeks rather than waiting for an annual round. Medium is the tier that carries the 50 TB-class ceilings. |
| Reliability | No backup on Arrhenius Disk or SENS Storage. Several listed resources (Alvis, Mimer) are mid-decommission with allocations being migrated — check resource status before requesting. |
| Parsed numbers |
|
Evidence 4
| date | source | what it proved |
|---|---|---|
| 2026-10-21 | supr.naiss.se/round/2026medium/ | resource table: 'Arrhenius Disk | NAISS | 50 000 | 250 | 4 000 000' (GiB), 'Klemming | PDC | 100 000 | 500 | 5 850 000'; Alvis and Mimer flagged as decommissioned/migrating |
| 2026-10-21 | supr.naiss.se/resource/arrhenius-disk/ | 'The total size of Arrhenius Disk is 25 PB. There is no backup of Arrhenius Disk.' Eligibility by tier. |
| 2026-10-21 | supr.naiss.se/resource/arrhenius-sens-storage/ | 'The total size of Arrhenius SENS Storage is 10 PB. There is no backup'; 'only available as when applying for a related compute resource' |
| 2026-10-21 | user.naiss.se/allocations/small/ | 'Proposals are reviewed weekly throughout the year'; 'at least a PhD student and hold an appointment of at least 20 percent at a Swedish university' |
Unknown values 3
- per object cap notes: the field may be stated in a source that was not read
- retention notes: the field may be stated in a source that was not read
- retention stated: the field may be stated in a source that was not read