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ONTAP指标何时衡量客户端往返时间或仅衡量内部ONTAP时间?

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ontap-9
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perf
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适用场景

  • ONTAP 9
  • ONTAP S3服务器
  • FCP
  • iSCSI
  • CIFS
  • NFS

问题解答

NAS
  • NAS协议(CIFS)仅测量将CIFS或SMB/NFS请求数据包传入网络层、在网络层进行处理和完成响应的时间。
    • 网络层与通过线缆发送的数据包之间有一段时间未涵盖、但这是最小的。
    • 如果在函数库中查看,您将看到请求后的NFS/SMB响应时间(服务响应时间或SRT)。
  • 每个协议都会将一个大型读取或写入拆分成若干个区块、但不会跟踪此网络时间。
SAN
ONTAP S3服务器
  • S3协议与此类似、因为每个请求可以有多MB的空间、因此可以在网络延迟中心跟踪从请求到最终完成之间的TCP延迟。
  • 大型读取或写入(获取/放置)可能会拆分成若干个区块、并对此进行跟踪。
  • 此图显示的 Network 列中可能存在的一些延迟 qos statistics volume latency show

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