What is the order between new snapshots auto-creation and old snapshot auto-deletion?
Applies to
- ONTAP 9
- volume-level Snapshot copies
- Snapshot auto-creation\auto-deletion
Answer
ONTAP deletes the oldest snapshot and then generates a new snapshot based on volume snapshot policy
Additional Information
Example:
lccls910102::> snapshot show -volume vol2;date
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm91002 vol2
weekly.2023-11-12_0015 1.26MB 1% 80%
weekly.2023-11-19_0015 1.21MB 1% 79%
daily.2023-11-23_0010 1.16MB 1% 78%
daily.2023-11-24_0010 1.12MB 1% 78%
hourly.2023-11-24_0905 132KB 0% 28%
hourly.2023-11-24_1005 132KB 0% 28%
hourly.2023-11-24_1105 132KB 0% 28%
hourly.2023-11-24_1205 568KB 1% 63%
5min.2023-11-25_1555 136KB 0% 29%
5min.2023-11-25_1600 1.33MB 1% 80%
5min.2023-11-25_1605 132KB 0% 28%
11 entries were displayed. <<<<<<< Maximum Snapshots for the Schedule of 5min.yyyy-mm-dd_hhmm snapshots is 3.
Node Date Time zone
--------- ------------------------ -------------------------
lccls910102-01
Sat Nov 25 16:09:59 2023 PRC
lccls910102::> snapshot show -volume vol2;date
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm91002 vol2
weekly.2023-11-12_0015 1.26MB 1% 85%
weekly.2023-11-19_0015 1.21MB 1% 85%
daily.2023-11-23_0010 1.16MB 1% 84%
daily.2023-11-24_0010 1.12MB 1% 84%
hourly.2023-11-24_0905 132KB 0% 37%
hourly.2023-11-24_1005 132KB 0% 37%
hourly.2023-11-24_1105 132KB 0% 37%
hourly.2023-11-24_1205 568KB 1% 72%
5min.2023-11-25_1600 1.33MB 1% 86%
5min.2023-11-25_1605 136KB 0% 38%
10 entries were displayed. <<<<<<< The oldest snapshot named 5min.2023-11-25_1555 was deleted firstly.
Node Date Time zone
--------- ------------------------ -------------------------
lccls910102-01
Sat Nov 25 16:10:00 2023 PRC
lccls910102::> snapshot show -volume vol2;date
---Blocks---
Vserver Volume Snapshot Size Total% Used%
-------- -------- ------------------------------------- -------- ------ -----
svm91002 vol2
weekly.2023-11-12_0015 1.26MB 1% 79%
weekly.2023-11-19_0015 1.21MB 1% 78%
daily.2023-11-23_0010 1.16MB 1% 77%
daily.2023-11-24_0010 1.12MB 1% 77%
hourly.2023-11-24_0905 132KB 0% 28%
hourly.2023-11-24_1005 132KB 0% 28%
hourly.2023-11-24_1105 132KB 0% 28%
hourly.2023-11-24_1205 568KB 1% 62%
5min.2023-11-25_1600 1.33MB 1% 80%
5min.2023-11-25_1605 136KB 0% 28%
5min.2023-11-25_1610 0B 0% 0%
11 entries were displayed. <<<<<<< The new snapshot named 5min.2023-11-25_1610 was generated later.
Node Date Time zone
--------- ------------------------ -------------------------
lccls910102-01
Sat Nov 25 16:10:00 2023 PRC