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ONTAP FlexArray WAFL が、ワークロードの大規模な増加に伴い停止する

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に適用されます

  • ONTAP 9.x
  • E シリーズ

問題

  • WAFL パニックおよびノードのリブート
  • E シリーズで Fibre Channel エラーが報告される 
  • 非常に高いパフォーマンスの低下
    • ボリューム / LUN でレイテンシが非常に高いか、「使用できません」と報告されています
  • 1 つのポート「 Disk device 0z.1L00 」に対する SCSI 転送エラー
  • ノードで長い整合ポイント( CP )が発生しました
EMS メッセージの例:
WAFL hung for <node>. in SK process wafl_exempt07 on release 9.6P5
ERROR  scsi.cmd.transportErrorEMSOnly: Disk device : Transport error during execution of command: HA status
wafl.cp.toolong: Aggregate xyz experienced a long CP
mlm.non.optimized.TPusage: Detected non-optimized usage of a array's target port
cf.multidisk.fatalProblem:info]: Node encountered a multidisk error or other fatal error while waiting to be taken over
"Host-side: controller in slot B, port <port>: Fiber channel link errors - threshold exceeded"

 

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