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一部のアプリケーションが FlexCache ボリュームで適切に動作しない

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Category:
ontap-9
Specialty:
nas
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環境

  • ONTAP 9
  • FlexCache
  • CIFS / SMB

問題

 FlexCache上のONTAP CIFS共有に保存されているファイルにアクセスするアプリケーションを使用しているユーザのパフォーマンスが低下します

  • ONTAPノードで収集されたパケットトレースに基づくSMB2サービス応答時間(SRT)
 
===========================================================================
SMB2 Service Response Time Statistics - e0a_20251009_072351.trc0:
Index  Procedure  Calls  Min SRT (s)  Max SRT (s)  Avg SRT (s)  Sum SRT (s)
---------------------------------------------------------------------------
SMB2
Close      6  7797   0.000022   0.357435   0.004638   36.161835
Create     5  8170   0.000075   3.059123   0.015026  122.763699
Find      14  1920   0.000025   1.604687   0.032183   61.792121
GetInfo    16  4383   0.000039   0.094130   0.002366   10.371389
Ioctl     11   33   0.000050   0.000479   0.000150   0.004939
Notify     15   11   1.585816  376.230103   49.690147  546.591618
Read      8 12285   0.000030   2.493342   0.004877   59.915164
SetInfo    17   640   0.000053   0.058788   0.014454   9.250445
Tree Connect  3    7   0.000081   0.000131   0.000105   0.000734
Tree Disconnec 4    7   0.000067   0.000097   0.000082   0.000576
Write      9 34371   0.000081   1.013845   0.012086  415.424646
SMB2
---------------------------------------------------------------------------
 
  • 観測:
    • 書き込み負荷の高いワークロード
    • Create 呼び出しと Close 呼び出しの数が比較的多い

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