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メトロクラスタ環境における書き込み遅延と低いスループット

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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い
  • IOPSの数値が期待値よりも低い
  • CLIからコマンドを使用して確認する 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  

上記の例は、volume_1 NVLog転送の影響を受ける レイテンシー

 

 

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