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iSCSI SAN环境中的网络延迟较高

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适用场景

  • NetApp FAS/AFF 系统
  • iSCSI 协议

问题描述

  • 通过iSCSI访问LUN的主机上的工作负载会产生大量应用程序和客户端延迟
  • ONTAP 的延迟计数器延迟较低(不到 5 毫秒)
  • SAN 环境中的网络延迟显示在 Network 延迟中心或 Network Active IQ Unified Manager ( AIQUM )中,但 Network Processing不显示在集群组件卷视图下

示例:

qos statistics volume latency showNetwork 列中显示了三个SAN工作负载的高延迟

cluster::> qos statistics volume latency show -node san_node1
Workload ID Latency Network Cluster Data Disk QoS NVRAM Cloud ----------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- volume_SAN1 17882 20.51ms 20.51ms 0ms 0ms 0ms 0ms 0ms 0ms volume_SAN2 5232 15.00ms 15.00ms 0ms 0ms 0ms 0ms 0ms 0ms volume_SAN3 17160 16.00ms 16.00ms 0ms 0ms 0ms 0ms 0ms 0ms

 

 

 

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