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由网络端口上的 CRC 错误导致的 NAS 访问缓慢或挂起

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Category:
ontap-9
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perf
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适用于

  • ONTAP 9
  • NFS
  • CIFS

问题

  • 每次运行应用程序时观察到缓慢的数据传输和高读取延迟
  • QOS 统计卷延迟命令减慢小延迟
  • NFS 客户端报告以下错误并挂起:

kernel: nfs: server 10.xx.xx.xx not responding, still trying 

  • 数据包跟踪(来自客户端或存储)可能会显示重传和无序数据包
  • 在 CIFS 中,共享在读取和写入时遇到缓慢
  • 检查网络错误
    • 从文件管理器中,您可以使用以下命令检查端口
      • >>: 受影响端口的 node run -node node1 -command "ifstat-a"
    • 让网络团队也审查连接的交换机端口
  • cluster::> system node run -node "nodename" -command ifstat -a -- interface e4a (2 days, 10 hours, 22 minutes, 35 seconds) -- RECEIVE Total frames: 5161m | Frames/second: 24558 | Total bytes: 5152g Bytes/second: 24516k | Total errors: 35927 | Errors/minute: 10 Total discards: 0 | Discards/minute: 0 | Multi/broadcast: 26826k Non-primary u/c: 0 | CRC errors: 35927 | Runt frames: 0 Fragment: 0 | Long frames: 0 | Jabber: 0 Length errors: 0 | No buffer: 0 | Xon: 0 Xoff: 0 | Pause: 0 | Jumbo: 218k Noproto: 0 | Error symbol: 0 | Illegal symbol: 0 Bus overruns: 0 | Queue drops: 0 | LRO segments: 2060m LRO bytes: 4909g | LRO6 segments: 0 | LRO6 bytes: 0 Bad UDP cksum: 0 | Bad UDP6 cksum: 0 | Bad TCP cksum: 0 Bad TCP6 cksum: 0 | Mcast v6 solicit: 0 | Lagg errors: 0 Lacp errors: 0 | Lacp PDU errors: 0
  • CRC 错误指示接收方数据问题
  • CRC 由于重新传输和接收的无序数据包而导致数据包丢失。

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