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IO大小大于或等于256 KB的集群互连延迟较高

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perf<a>用于</a><a>翻译</a><a>的2009-202643 </a>
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适用场景

  • ONTAP 9
  • NFS
  • CIFS

问题描述

  • 观察到高延迟和/或低吞吐量。
  • 高延迟主要来自集群互连、可通过CLI、AIQ PAS或任何其他性能监控工具进行确认:

cluster1::> qos statistics volume latency show -instance vol1
Workload     ID    Latency  Network  Cluster   Data    Disk    QoS     NVRAM    Cloud
--------------- ------ -------- -------- -------- -------- -------- -------- ---------- ----------
vol1       1234   85.87ms   0ms   85.19ms  435.00us    0ms    0ms     0ms     0ms

  • FlexGroup 可能存在混合行为:
    • 仅具有直接访问权限的成分卷的延迟较低。
    • 具有间接访问的成分卷在集群互连中的延迟要高得多。
  • CIFS和NFS都会受到影响、只有当较大的IO大小等于或大于256 KB时、才会观察到这种高延迟。 

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