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Cloud Volumes ONTAP 解決ガイドでNVRAMのレイテンシが高くなっています

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環境

  • ONTAP 9
  • Cloud Volumes ONTAP(CVO)

問題

  • ユーザのワークロードの応答に時間がかかる( NAS または SAN )
  • レイテンシは qos statistics volume latency showNVRAM列の下に表示されます。
::> qos statistics volume latency show Workload ID Latency Network Cluster Data Disk QoS NVRAM Cloud FlexCache SM Sync --------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- -total- - 195.97ms 150.00us 0ms 796.00us 0ms 0ms 1195.03ms 0ms 0ms 0ms data1-wid30897 30897 1.60s 157.00us 0ms 818.00us 0ms 0ms 1.60s 0ms 0ms 0ms -total- - 536.23ms 110.00us 0ms 495.00us 0ms 0ms 535.63ms 0ms 0ms 0ms data1-wid30897 30897 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms 0ms -total- - 7.42s 136.00us 0ms 743.00us 0ms 0ms 7.42s 0ms 0ms 0ms data1-wid30897 30897 1137.67ms 1.65ms 0ms 3.55ms 0ms 0ms 1132.47ms 0ms 0ms 0ms

例: vol1で書き込みワークロードが増加し、同じ時間(2020年9月16日午前12時以降)にvNVRAMのレイテンシが発生していた

Cloud Volumes ONTAP解決ガイドでの高NVRAMレイテンシ

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