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报告了高 ONTAP 延迟,但在查看工作负载延迟细分时,未在 qos statistics volume latency show 或性能存档数据中显示

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ontap-9
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perf
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适用于

  • ONTAP 9
  • CIFS
  • NFS
  • ActiveIQ Unitified Manager

问题描述

  • 从 ActiveIQ Unitified Manager 或 qos statistics volume performance show 观察到高延迟。
  • 但运行 qos statistics volume latency show 并不表示有延迟。
  • 尽管没有明显的 CPU 或磁盘瓶颈,但客户端和 ONTAP 都报告了高延迟。

示例:

Cluster::> 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 
Cluster::> 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
  • 查看涵盖该问题的性能存档数据,在查看受影响卷的工作负载延迟细分时,观察到的延迟未计入存储。
  • 没有延迟中心显示任何来自 qos statistics volume latency show 的重大延迟,但客户端报告高延迟。

 

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