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如何测量从卷层报告的操作和延迟

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适用场景

ONTAP 9

问题描述

  • 卷层用于测量WAFL文件系统处理的请求速率以及 将响应发送回上层所需的时间
  • 卷层可以测量整个卷以及每个协议的操作和延迟
    • NFS
    • CIFS
    • FCP
    • iSCSI
    • NVMF
    • 复制(SnapMirror)
    • Sync REPL (同步SnapMirror)
  • 卷层延迟不等于同一卷上报告的QoS延迟。 
    • 卷层操作和延迟在WAFL文件系统层测量
    • QoS操作和延迟在协议层测量
    • QoS延迟通常高于卷延迟、因为卷延迟是QoS延迟的一部分
      • QoS延迟=从报告的总延迟 qos statistics volume latency show
      • 卷延迟~= 数据 + 磁盘 延迟 qos statistics volume latency show
    • QoS操作可能等于、也可能不等于卷操作、具体取决于前端/协议操作的类型

 

 

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