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升级到 ONTAP 9.7 后,由于 QoS 最小化,延迟增加

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适用场景

  • ONTAP 9.7 或 ONTAP 9.8 
  • 服务质量 (QoS)
  • 自适应服务质量( AQoS )。

问题描述

  • 可能会出现以下 EMS 错误:
 [<node_name>: qos_vd_window_manager: qos.VioDet.maxThrottle:notice]: QoS violation limit for NODE <UUID> is 95424 IOPS. 
  • 升级到 ONTAP 9.7 后,由于 QoS ,延迟增加
  • QoS Min 延迟中心可以看到高延迟,而工作负载较低

示例:

 Cluster::> qos statistics volume latency show Workload ID Latency Network Cluster Data Disk QoS Max QoS Min NVRAM --------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ... vol1-wid123 1456 719.23ms 383.00us 4.00us 525.00us 145.00us 0ms 717.99ms 177.00us vol2-wid234 16744 716.25ms 386.00us 4.00us 613.00us 117.00us 0ms 714.91ms 215.00us vol3-wid567 6399 712.09ms 442.00us 0ms 1281.00us 1284.00us 0ms 709.08ms 0ms 

 

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