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AIQUM中的SVM延迟和卷延迟有何区别?

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适用场景

  • Active IQ Unified Manager (AIQUM)
  • ONTAP 9

问题解答

  • 通过选择 性能:存储 > Storage VM中的所有Storage VM视图可显示SVM延迟。此值取决于每个SVM的IOPS和响应请求的时间。
  • 可通过选择 性能:存储中的所有卷视图 > 卷来显示卷延迟。此值取决于每个卷的IOPS和响应请求的时间。
  • SVM延迟并不表示SVM下所有卷的平均延迟。

    示例: 
    假设SVM包含volumeA和volumeB两个卷、并具有以下统计信息:

    volumeA
    :IOPS 100[op]和响应1000[ms]的时间B:IOPS 400[op]和响应时间12000 [ms]
     
    • 通过计算、volumeA的卷延迟为10 [ms/op]1000[ms]/100[op]
    • 通过计算、volumeB的卷延迟为30 [ms/op]12000[ms]/400[op]
    • 计算得出的SVM延迟为26 [ms/op] (1000+12000)[ms]/(100+400)[op]

注意: AIQUM每5分钟从ONTAP集群收集这些性能统计信息

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