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FlexCache の書き戻しと CifsOperationTimedOut エラー

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Category:
ontap-9
Specialty:
perf
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環境

  • ONTAP 9
  • FlexCache
  • CIFS

問題

  • ONTAP バージョン 9.16.1 へのアップデート後に CIFS レイテンシが高くなる
  • クライアント側およびファイラー側の両方でパフォーマンス問題が発生
  • ライトバックが有効になっている
  • 一部のケースでは、データ要求間の時間が 2000 秒を超え、タイムアウトセッションやデータ破損が発生する
  • EMS エラー:
Mon Nov 17 07:39:37 +0100 [cluster01: kernel: ems.engine.suppressed:debug]: Event 'Nblade.CifsOperationTimedOut' suppressed 2 times in last 138539 seconds.
Mon Nov 17 07:39:37 +0100 [cluster01: kernel: Nblade_CifsOperationTimedOut_1:error]: params: {'commandName': 'SMB2_COM_CREATE', 'suspensionCnt': '497262', 'cmdRestartCnt': '0', 'lastCsmError': 'CSM_OK', 'remoteBladeID': '000a0000-0000-00a0-00a0-a000aaaa00a0 (node_name01)', 'isQosEnabled': 'QoS_disabled', 'lastSpinNpError': '3018', 'clientIpAddress': '1.1.1.1', 'localIpAddress': '2.2.2.2', 'vserverId': 'x', 'dsId': 'xxxx', 'vserverName': 'vserver_name01', 'volumeName': 'volume_name01'}
  • 例 統計情報:
Object: csm_session
Instance: 0xxxxxxxxxxxxxxxxxx
Start-time: 11/4/2025 14:16:39
End-time: 11/4/2025 14:16:50
Elapsed-time: 11s
Scope: node01
Counter                         Value
---------------------------- -----------
spinnp_op_latency            1106162us
spinnp_req_service_latency        39us

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