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QoS限制导致卷延迟较高

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Category:
ontap-9
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Perf
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适用场景

  • ONTAP 9
  • AFF系列
  • FAS 系统
  • CVO
  • 服务质量 (QoS)

问题描述

  • 达到QoS限制后、观察到的LUN /卷/qtree延迟会增加
  • 随着工作负载的变化、可能需要调整QoS限制、以帮助管理客户端 性能预期
  • 可能会从Active IQ Unified Manager看到此警报: 事件警报、 已违反性能服务级别策略定义的工作负载LUN延迟阈值
  • 此延迟将显示在qos statistics volume latency showQoS Max 列中:

::> qos statistics volume latency show -volume qostest -vserver testsvm
Workload       ID   Latency   Network   Cluster     Data     Disk   QoS Max   QoS Min    NVRAM
--------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
-total-        -   646.73ms  1377.00us     0ms   262.00us    9.49ms   635.60ms     0ms     0ms
qostest-wid23..  23350   646.73ms  1377.00us     0ms   262.00us    9.49ms   635.60ms     0ms     0ms
-total-        -   634.31ms  1430.00us     0ms   263.00us    6.78ms   625.83ms     0ms     0ms
qostest-wid23..  23350   634.31ms  1430.00us     0ms   263.00us    6.78ms   625.83ms     0ms     0ms
-total-        -   640.86ms  1324.00us     0ms   304.00us    7.62ms   631.61ms     0ms     0ms
qostest-wid23..  23350   640.86ms  1324.00us     0ms   304.00us    7.62ms   631.61ms     0ms     0ms
-total-        -   659.83ms  1357.00us     0ms   303.00us    7.50ms   650.67ms     0ms     0ms
qostest-wid23..  23350   659.83ms  1357.00us     0ms   303.00us    7.50ms   650.67ms     0ms     0ms

 

 

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