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QoS限制导致卷延迟较高

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23
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Public
Votes:
2
Category:
ontap-9
Specialty:
perf<a>QoS</a><a>延迟</a><a>AFF FAS ONTAP</a><a /><a> 9.x</a>
Last Updated:

适用场景

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

问题描述

  • QoS用于帮助控制 争用有限集群 CPU和磁盘资源的工作负载

  • 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。 
  • 可能会看到此警报:  AIQUM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
  • 审核日志显示
  • 延迟中心QoS最大值将在命令行界面中显示高延迟
cluster::> 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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