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由于用户工作负载中的SATA磁盘速度较慢、导致读取延迟

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ontap-9
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perf
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适用场景

  • ONTAP 9
  • FAS2720

问题描述

  • 读取延迟每天同时从5毫秒跳至15毫秒
  • 如果  正在执行VMotion或其他迁移活动、则读取延迟会增加到几毫秒。
  • 延迟中心显示磁盘延迟

::> qos statistics workload latency show
Workload       ID   Latency   Network   Cluster     Data    Disk  QoS Max   QoS Min    NVRAM    Cloud  FlexCache   SM Sync      VA    AVSCAN
--------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
-total-        -   15.13ms   534.00us  1027.00us     0ms     13.57ms  0ms     0ms     0ms     0ms     0ms     0ms     0ms     0ms
vol01-wid39663    39663   15.13ms   534.00us  1027.00us     0ms     13.57ms  0ms     0ms     0ms     0ms     0ms     0ms     0ms     0ms

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