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ONTAP iSCSI SANの継続的な中断

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環境

  • ONTAP iSCSI SAN
  • VMware ESXi

問題

  • 特定のONTAPノードを使用したVMware vSphereクラスタの継続的な中断
  • 仮想マシンが非常に遅く、ユーザが切断される
  • ONTAPでCRCエラーが検出される
  • Ciscoスイッチ ポートがパケット損失を報告する
vmkernel log:
tail -f /var/log/vmkernel.logVMW_SATP_ALUA: satp_alua_issue CommandOnPath Path command Failed with transient error status Transient storage condition
  • qos statistics volume latency show iSCSI SANワークロードのNetwork列に高レイテンシが表示される 
cluster::> qos statistics volume latency show -node san_node1
Workload ID Latency Network Cluster Data Disk QoS NVRAM Cloud ----------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- volume_SAN1 17882 20.51ms 20.51ms 0ms 0ms 0ms 0ms 0ms 0ms volume_SAN2 5232 15.00ms 15.00ms 0ms 0ms 0ms 0ms 0ms 0ms volume_SAN3 17160 16.00ms 16.00ms 0ms 0ms 0ms 0ms 0ms 0ms

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