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MetroCluster SDSでのNVLog転送による高い書き込み遅延

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ontap-9
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dp<a>2009912276</a>
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環境

  • ONTAP 9
  • MetroCluster Software-Defined Storage(MCC SDS)

問題

  • ネットワーク構成VXLAN後のMCC SDSでの高い書き込み遅延
  • CLIから、コマンドqos statistics volume latency showを使用して確認します。

cluster::> qos statistics volume latency show -node test_node1

Workload       ID    Latency    Network    Cluster       Data       Disk      QoS      NVRAM      Cloud 

------------ ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- -

volume_1    12578  15426ms    1ms      0ms     0.5us      1ms    0ms    123ms        0ms  

  • EMSでアラートが表示される:
Wed Jan 17 09:01:35 +0800 [PDC-SDC-ONTAP-MCC-A-02: pha_main001: mlm.excessive.TPlatency:notice]: Average latency of 250077us on target port 5302800000030000, has exceeded 250000us
Wed Jan 17 09:02:33 +0800 [PDC-SDC-ONTAP-MCC-A-02: pha_main000: mlm.excessive.TPlatency:notice]: Average latency of 250135us on target port 5301800000040000, has exceeded 250000us

 

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