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Snapshotから作成されたクローンが原因でSnapshotの作成が失敗する

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Category:
ontap-9
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core
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環境

  • ONTAP 9
  • SISファイルクローン
  • SISクローン

問題

  • Snapshot作成処理の失敗

::> snapshot create -vserver MySVM -volume MyVolume -snapshot MySnapshot
Error: command failed: Failed to create snapshot "MySnapshot" of volume "MyVolume" on Vserver "MySVM". Reason: Snapshot operation not allowed due to clones backed by snapshots. Try again after sometime.

  • イベントログに表示される内容:

::> event log show
Wed Nov 08 15:10:00 +0100 [MyCluster-01: snapd_cmode: wafl.snap.create.skip.reason:error]: MyVolume  655ccab3-a41b-11e5-848b-000e1e245750: Skipping creation of MySnapshot Snapshot copy (Snapshot operation not allowed due to clones backed by snapshots. Try again after sometime.).

  • Snapshotの作成に失敗したボリュームにはSIS Clone が所有するbusy=true Snapshotがあります。

::> snapshot show -busy true -fields busy,owner,create-time
vserver         volume      snapshot                create-time              busy owners
--------------- ----------- ----------------------- ------------------------ ---- -----------
MySVM       MyVolume    SomeSnapshot           Wed Nov 01 06:00:00 2023 true "SIS Clone"

  • 関連するSISファイルのクローンスプリット処理にSplit Load が表示されますが、処理が停止していて進行していない可能性があります。

::> volume file clone split load show
Node               Max     Current   Token      Allowable
                 Split Load Split Load Reserved Load Split Load
------------------------------- ---------- ---------- ------------- ----------
MyCluster-01            675TB      0B       0B    675TB
MyCluster-02             675TB     1MB      0B   675.0TB
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