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性能中报告的网络统计信息不正确

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Category:
ontap-9
Specialty:
perf
Last Updated:

适用于

  • ONTAP 9.7
  • ONTAP 9.8
  • QLogic CNA 卡

问题描述

  • 中的网络输出 sysstat -x 1 显示的网络出站吞吐量远低于预期。
    示例:
    • 在读取吞吐量稳定为 500 MB/ 秒的 Filer 上,网络输出仅约为 1 MB/ 秒
  • 使用 QLogic CNA 卡Total bytesBytes/secondifstat -a.
    的物理 NIC 端口在示例:中显示的传输统计信息不准确
    • 接口组a0a 由 4 个物理端口组成— e0c/e0d/e0e/eof在中 ifconfig -a
      a0a: flags=8843 metric 0 mtu 1500
              options=6407bb
              ether 02:a0:98:d2:c5:30
              hwaddr 02:a0:98:d2:c5:30
              pcp 1
              laggproto lacp lagghash l3
              laggport: e0e flags=1c
              laggport: e0f flags=1c
              laggport: e0c flags=1c
              laggport: e0d flags=1c

              groups: lagg
              media: Ethernet autoselect
              status: active
    • 可以从网络层观察到繁重的出站吞吐量,但它仅在 VLAN 中可见a0a-6,不可用于接口组a0a或任何底层物理端口:

-- interface  a0a-6  (0 hours, 1 minute, 23 seconds) --
TRANSMIT
 Total frames:    1630k | Frames/second:   18955  | Total bytes:   46812m
 Bytes/second:    544m | Total errors:     0  | Errors/minute:     0

-- interface  a0a  (0 hours, 1 minute, 23 seconds) --
TRANSMIT
 Total frames:    1630k | Frames/second:   18955  | Total bytes:    106m
 Bytes/second:   1239k | Total errors:     0  | Errors/minute:     0

-- interface  e0c  (0 hours, 1 minute, 23 seconds) --
TRANSMIT
 Total frames:    235k | Frames/second:   2738  | Total bytes:   15361k
 Bytes/second:    178k | Total errors:     0  | Errors/minute:     0

-- interface  e0d  (0 hours, 1 minute, 23 seconds) --
TRANSMIT
 Total frames:   44094  | Frames/second:    513  | Total bytes:    2742k
 Bytes/second:   31895  | Total errors:     0  | Errors/minute:     0

-- interface  e0e  (0 hours, 1 minute, 23 seconds) --
TRANSMIT
 Total frames:    1340k | Frames/second:   15586  | Total bytes:   87814k
 Bytes/second:   1021k | Total errors:     0  | Errors/minute:     0

-- interface  e0f  (0 hours, 1 minute, 23 seconds) --
TRANSMIT
 Total frames:   10853  | Frames/second:    126  | Total bytes:    711k
 Bytes/second:   8273  | Total errors:     0  | Errors/minute:     0

 

注:

  • TRANSMIT Total bytes for interface group a0aTRANSMIT Total bytes 所有中的的总和 底层物理端口
  • 但是 TRANSMIT Total bytes ,对于接口组 a0a ,则要比低很多 TRANSMIT Total bytes 用于 VLAN a0a-6

 

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