Home / Storage
IAS3 old-version retention (x-archive-keep-old-version)
archive.org/developers/ias3.htmlAcademicstorage/ias3-old-version-retentionJSONcomparereport an errorprovider JSON
- Free allowance
- No quota of its own — it multiplies the 1TB item limit by however many versions you PUT.
- 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
- noneno named constraint binds
- Evidence
- reported2 sources; a third party said so
- Freshness
- stale on 2026-11-05checked 2026-10-21 (inherited); stale on 2026-11-05
| Free tier | No quota of its own — it multiplies the 1TB item limit by however many versions you PUT. unit mixed; metered on stored-bytes |
|---|
| Price | none stated |
|---|
| Identity | institution (placeholder) inferred from the category 'academic'; the source record states no identity cost, so this is a class assumption, not evidence |
|---|
| Egress | Free (history files are served through the same item path) |
|---|
| Per-object cap | not stated |
|---|
| Retention | not stated |
|---|
| Interface | s3, rclone s3 |
|---|
| Tooling | raw IAS3 PUT header; rclone does not expose it, so a thin curl/requests shim is needed |
|---|
| Composes with | A 20TiB cold archive can be stored as ~20 versions of a 1TB item if the payload changes, or used as a free append-only version store per key. Combined with x-archive-cascade-delete:1 for cleanup. |
|---|
| Reliability | Unofficial-ish surface: documented but not exposed by any major client, so it is untested at scale and easy to orphan copies with. |
|---|
| Parsed numbers | |
|---|
Evidence 2
Unknown values 4
- per object cap notes: the field may be stated in a source that was not read
- per object cap stated: 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