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使用 QoS 时延迟突然增加 - 解决方案指南

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ontap-9
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适用于

  • ONTAP 9
  • 服务质量 (QoS)
  • NAS 协议 - NFS 和 CIFS
  • SAN 协议 - FCP 和 iSCSI

问题

  • 使用 QoS 策略时,QoS 延迟将突然增加
  • 网络豁免利用率 - 协议操作的 CPU 处理  - 将增加。
  • 由于网络豁免处理域已饱和,每当达到 QoS 最大限制时,用户可能会报告间歇性缓慢/延迟问题。 
    • 来自集群互连的延迟
    • 来自网络处理的延迟,也称为 CPU N-Blade 或网络豁免(Nwk_Exmpt)
  • 由于工作负载本质上具有突发性,在客户端执行任何测试(如运行 dd 命令)都会报告高延迟。 

 

 

 

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