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由于缺少 TCP 分段卸载( TSO ),升级到 ONTAP 9.7 及更高版本时性能受到影响

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适用场景

  • ONTAP 9.7 - 9.7P7
  • 接口组配置了集群间或节点管理 LIF 的系统 

问题描述

  • TCP 分段卸载( TSO )在此期间不适用于某些接口组 在 ONTAP 9.7 上
  • TSO 为 system node run -node <node> ifstat <port>受影响的接口组统计零或不递增
 -- interface a0a (33 days, 13 hours, 19 minutes, 43 seconds) -- RECEIVE (...) TRANSMIT Total frames: 22322m | Frames/second: 7700 | Total bytes: 1225g (...) TSO non-TCP drop: 0 | Split hdr drop: 0 | Timeout: 0 TSO segments: 0 | TSO bytes: 0 | TSO6 segments: 0 <<< TSO Segments is 0 or not increasing
  • 提高性能统计信息中的网络 / 刀片式服务器利用率
    • 网络 / 刀片式服务器利用率的提高可能会导致 LACP 端口摆动
      • "事件 日志中的 net.ifgrp.lacp.link.inactive' 事件反映了此症状
  • 可能会注意到写入和读取吞吐量的性能差异很大

 

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