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由于大量 FlexCache 连接导致 WAN 利用率高和 NFS 速度慢

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Category:
ontap-9
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nas
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适用于

  • NetApp ONTAP 9
  • FlexCache
  • WAN
  • NFS

问题描述

  • 客户报告说,2000多名用户通过广域网链路通过 NFS 访问 FlexCache 卷的速度非常慢。WAN 利用率超过 20%(有时高达 25%)用于 FlexCache 相关集群间流量,即使实际数据使用量要低得多(1-2%)。这导致性能下降和远程站点不可用。
  • 症状/日志输出:
    • 大量 TCP 会话和数据穿过 WAN(防火墙团队报告高达 2TB/天)。
    • 群集间程序端口 11105 上的频繁重传。
    • 重要保活流量:仅保活每天计算约 113GB。
    • 集群之间的许多连接,特别是在节点重新启动或对等添加之后。

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