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反复出现的卷延迟和 IOPS 超出严重阈值

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cloud-volumes-ontap-cvo
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适用于

  • ONTAP 9
  • CLOUD VOLUMES ONTAP (CVO)

问题

  • 每天大约 在 同一 时间 重复出现的延迟突破 200ms/op 阈值
  • 这些 事件 通常 持续 约  10  分钟, 并 影响 单 个  NFS  卷
  • 特定 的 客户端 工作负载 详细信息 和 计时 模式 仍 在 等待 客户 提供 
  • 聚合在同一时间经历较长的 CP
  • qos  显示 受影响 卷 的 网络 延迟 最 高 
::> qos statistics volume latency show -vserver <svm> -volume vol01
Workload            ID    Latency    Network    Cluster       Data       Disk    QoS Max    QoS Min      NVRAM      Cloud  FlexCache    SM Sync         VA      AVSCAN
--------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
-total-              -   609.56ms   523.19ms        0ms    78.13ms   187.00us        0ms        0ms     7.98ms    78.00us        0ms        0ms        0ms        0ms
vol01-w..  12345  1040.89ms   918.04ms        0ms   109.95ms   169.00us        0ms        0ms    12.60ms   139.00us        0ms        0ms        0ms        0ms
-total-              -   460.17ms   409.43ms        0ms    45.45ms   313.00us        0ms        0ms     4.87ms   100.00us        0ms        0ms        0ms        0ms
vol01-w..  12345   860.43ms   777.27ms        0ms    75.24ms   225.00us        0ms        0ms     7.50ms   191.00us        0ms        0ms        0ms        0ms
-total-              -   352.25ms   282.18ms        0ms    62.86ms   159.00us        0ms        0ms     6.98ms    75.00us        0ms        0ms        0ms        0ms
vol01-w..  12345   950.57ms   785.62ms        0ms   148.29ms   148.00us        0ms        0ms    16.31ms   209.00us        0ms        0ms        0ms        0ms

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