Infrequent Access (IA), Archive, Cold Archive, and Deep Cold Archive storage classes each require a minimum storage duration. If you delete or convert an object before that minimum elapses, OSS charges you for the remaining days of the minimum period.
Minimum storage durations by storage class:
| Storage class | Minimum storage duration |
|---|---|
| Infrequent Access (IA) | 30 days |
| Archive | 60 days |
| Cold Archive | 180 days |
| Deep Cold Archive | 180 days |
How the duration is calculated
The starting point for the minimum storage duration depends on how the storage class was changed:
Lifecycle rule — IA and Archive: The minimum duration is counted from the object's last modified time.
Lifecycle rule — Cold Archive and Deep Cold Archive: The minimum duration is counted from the time the storage class was converted to Cold Archive or Deep Cold Archive.
Manual conversion via CopyObject: OSS resets the duration counter with each CopyObject call. The minimum duration restarts from the moment of each conversion.
Billing scenarios
The tables below show the charges for common conversion and deletion sequences.
Lifecycle rule-based conversions
| Conversion sequence | What you're charged |
|---|---|
| Standard → IA (day 10) → Archive (day 30) → deleted (day 35) | 10-day Standard fee + 20-day IA fee + 5-day Archive fee + 25-day Archive fee (60 − 35 = 25 remaining days of the Archive minimum) |
| Standard → Cold Archive or Deep Cold Archive (day 10) → deleted (day 11) | 10-day Standard fee + 1-day Cold Archive or Deep Cold Archive fee + 179-day Cold Archive or Deep Cold Archive fee (180 − 1 = 179 remaining days) |
| Archive (30 days) → Cold Archive or Deep Cold Archive (day 30) → deleted (day 31) | 30-day Archive fee + 1-day Cold Archive or Deep Cold Archive fee + 179-day Cold Archive or Deep Cold Archive fee (180 − 1 = 179 remaining days) |
| Cold Archive (10 days) → Deep Cold Archive (day 10) → deleted (day 11) | 10-day Cold Archive fee + 170-day Cold Archive fee (180 − 10 = 170 remaining days of the Cold Archive minimum) + 1-day Deep Cold Archive fee + 179-day Deep Cold Archive fee (180 − 1 = 179 remaining days of the Deep Cold Archive minimum) |
Manual CopyObject-based conversions
| Conversion sequence | What you're charged |
|---|---|
| Standard → IA via CopyObject (day 10) → Cold Archive via CopyObject (day 30) → deleted (day 35) | 10-day Standard fee + 20-day IA fee + 10-day IA fee (30 − 20 = 10 remaining days of the IA minimum) + 5-day Cold Archive fee + 175-day Cold Archive fee (180 − 5 = 175 remaining days of the Cold Archive minimum) |
For details on the billable items in these scenarios, see Storage fees.