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MetroCluster 環境での書き込みレイテンシと低スループット

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環境

  • ONTAP 9
  • Metrocluster

問題

  • MetroCluster システムでの書き込みレイテンシが高くなっています
  • 想定 IOPS よりも低い IOPS が表示されることがあります
  • CLI から、コマンドを使用して確認します qos statistics volume latency show 

例:

cluster::> qos statistics volume latency show -node node1

Workload       ID    Latency    Network    Cluster       Data       Disk      QoS     NVRAM      Cloud 

------------ ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- -

volume_1     12578   10ms    1ms      0ms     0.5us      1ms    0ms    9ms        0ms  volume_2       5232   2ms     1ms     0ms      0.25us     1ms    0ms     0ms        0ms  volume_3     17160   1ms    1ms        0ms         0.25us     1ms    0ms      0ms        0ms  

上記の例ではvolume_1、が NVLog 転送レイテンシに影響しています

 

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