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ファブリックMetroClusterの書き込みレイテンシが高い

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環境

  • ファブリックMetroCluster
  • ONTAP 9
  • Brocade FCスイッチ
  • ATTO 7500N/7600Nファイバブリッジ

問題

  • すべてのSVMおよびボリュームで書き込みレイテンシが高くなっています。
  • porterrshow  バックエンドスイッチからのsupportshow 出力にエラーは表示されません。
  • EMSログに、同じブリッジを示すSCSIコマンドが繰り返し中止されたエラーがすべて表示される:

Mon May 22 11:25:54 +0200 [cluster01_node01: slifc_intrd:scsi.cmd.abortedByHost:error]: Disk device switch001:7.126L39: Command aborted by host adapter: HA status 0x4: cdb 0x88:000000014c718748:00000008.

Mon May 22 11:26:47 +0200 [cluster01_node01: slifc_intrd:scsi.cmd.abortedByHost:error]: Disk device switch001:7.126L31: Command aborted by host adapter: HA status 0x4: cdb 0x9a:000000014c79ae00:0001:0200.

Mon May 22 11:27:57 +0200 [cluster01_node01: slifc_intrd:scsi.cmd.abortedByHost:error]: Disk device switch001:7.126L36: Command aborted by host adapter: HA status 0x4: cdb 0x28:d9746598:0018.

  • 影響を受けるブリッジに接続されているスイッチポートが無効になると、レイテンシは正常レベルに戻ります。

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