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已报告ONTAP 延迟较高、但未显示在QoS统计信息卷延迟中

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ontap-9
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适用场景

  • ONTAP 9
  • CIFS
  • NFS
  • ActiveIQ Unitied Manager

问题描述

  • 从ActiveIQ Unitied Manager或 qos statistics volume performance show中观察到高延迟。 
  • 但运行 qos statistics volume latency show 并不表示延迟。
  • 尽管没有明显的CPU或磁盘瓶颈、但客户端和ONTAP均报告延迟较高。

示例:

nas-cm95::> qos statistics volume performance show Workload ID IOPS Throughput Latency --------------- ------ -------- ---------------- ---------- -total- - 78 0.07KB/s 111.01ms data1-wid30897 30897 78 0.07KB/s 521.01ms -total- - 84 0.07KB/s 10.02s data1-wid30897 30897 84 0.07KB/s 25.02s -total- - 158 0.08KB/s 8.55s data1-wid30897 30897 158 0.08KB/s 10.07s -total- - 158 0.08KB/s 2.97s data1-wid30897 30897 158 0.08KB/s 3.11s 
nas-cm95::> qos statistics volume latency show Workload ID Latency Network Cluster Data Disk QoS NVRAM Cloud FlexCache SM Sync --------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- -total- - 367.00us 155.00us 3.00us 161.00us 0ms 0ms 0.00us 0ms 0ms 0ms data1-wid30897 30897 312.00us 160.00us 0ms 152.00us 0ms 0ms 0.00us 0ms 0ms 0ms -total- - 902.00us 153.00us 5.00us 151.00us 8.00us 0ms 0.00us 0ms 0ms 0ms data1-wid30897 30897 307.00us 150.00us 0ms 149.00us 8.00us 0ms 0.00us 0ms 0ms 0ms -total- - 1139.00us 149.00us 7.00us 141.00us 9.00us 0ms 0.00us 0ms 0ms 0ms data1-wid30897 30897 284.00us 145.00us 0ms 138.00us 1.00us 0ms 0.00us 0ms 0ms 0ms -total- - 343.00us 147.00us 5.00us 145.00us 0ms 0ms 0.00us 0ms 0ms 0ms data1-wid30897 30897 286.00us 146.00us 0ms 140.00us 0ms 0ms 0.00us 0ms 0ms 0ms
  • 可能没有延迟中心显示任何明显延迟 qos statistics volume latency show,但客户端报告延迟较长。

 

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