新しいSnapshotの自動作成と古いSnapshotの自動削除の順序を教えてください。
環境
- ONTAP 9
- ボリュームレベルのSnapshotコピー
- Snapshot の自動作成/自動削除
回答
ONTAPは最も古いSnapshotを削除し、 ボリュームSnapshotポリシーに基づいて新しいSnapshotを生成します。
追加情報
例：
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