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FlexCacheボリューム上のファイルアクセスに時間がかかる

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Category:
ontap-9
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nas
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pandar

色の定義

Color_Def.png

環境

  • ONTAP 9
  • FlexCache

問題

  • FlexCache ボリュームの応答が非常に遅く、4~5分後にボリュームにアクセスしようとすると、以下のエラーが発生します。

471 960.071616 10.x.y.20 10.x.y.138 SMB2 5818 12361 206  206 Find Request File: Miscellaneous\file SMB2_FIND_ID_BOTH_DIRECTORY_INFO Pattern: *;Find Request File: Miscellaneous\file SMB2_FIND_ID_BOTH_DIRECTORY_INFO Pattern: * 0.025682

After 53 seconds , (Jan 19th, 15:48:10 IST/  Jan 19th 10:18:10 UTC)

488 1013.330038 10.x.y.138 10.x.y.20 SMB2 12361 6024 157 53.258422000,53.258422000 157 Find Response, Error: STATUS_INTERNAL_ERROR;Find Response, Error: STATUS_INTERNAL_ERROR 3.806124

  • EMSエラー:
Nblade.CifsOperationTimedOut: Detected a timed out CIFS operation. SMB command for this operation: SMB2_COM_CREATE

原因

FlexCache - 'write-back' が有効になっているときに、FlexGroup が単一の構成要素で構成されていない

解決策

::> volume create -vserver <SVM_name> -volume <volume_name> -aggregate <aggregate_name> -size <size> -type flexgroup -constituent-count 1

または

  • あるいは、書き戻し機能を無効にします。

:::> volume flexcache config modify -volume <cache_vol_name> -is-writeback-enabled false

パートナーノート

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