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重新插入NVMe磁盘后、高延迟会持续20秒

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perf<a>2009年692503.</a>
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适用场景

  • ONTAP 9
  • NS224NSM100磁盘架
  •  NSM100.0210.SFW或更低版本

问题描述

  • 从物理上拔出磁盘不会产生任何发生原因高延迟
  • 将磁盘重新插入原来的位置会导致明显延迟(300毫秒以上)、此延迟至少持续20秒

Aug 08, 2023   interval     i/o   MB/sec   bytes   read    resp    read   write    read   write    resp  queue  cpu%  cpu%
                rate  1024**2    i/o   pct    time    resp    resp    max    max   stddev  depth sys+u   sys
11:05:52.002     7330   162810.0   635.98   4096  50.04   0.784   0.794   0.774   11.56    7.74   0.619  127.6   4.4   3.7
11:05:53.002     7331   65962.0   257.66   4096  49.95   1.833   2.804   0.865   148.01   130.48   8.057  127.9   2.1   1.7 
11:05:54.001     7332    6505.0   25.41   4096  50.10   13.984   27.135   0.779   564.42   237.50   39.614  127.9   0.2   0.2 <<<< latency starts to increase
11:05:55.002     7333    5183.0   20.25   4096  50.74   18.038   34.668   0.906  1669.83   134.46   77.484  128.0   0.2   0.1
11:05:56.001     7334    4021.0   15.71   4096  50.86   18.663   35.809   0.918  1925.62   323.81   85.525  127.9   0.1   0.1
11:05:57.001     7335    2029.0    7.93   4096  50.32   61.915  116.416   6.710  3475.53  2788.37  295.145  128.0   0.1   0.1
11:05:58.002     7336    1849.0    7.22   4096  51.65   70.809  129.283   8.346  4165.34  3871.72  351.452  128.0   0.1   0.0
11:05:59.001     7337    654.0    2.55   4096  52.75   87.737  164.500   2.031  4719.96   545.98  380.376  127.9   0.0   0.0
11:06:00.003     7338    248.0    0.97   4096  52.42  505.870  960.016   5.540  5977.56   624.00 1307.227  128.0   0.0   0.0
11:06:01.002     7339     82.0    0.32   4096  53.66  435.734  784.257   32.180  5011.87  1213.09 1222.068  128.0   0.0   0.0
11:06:02.001     7340    272.0    1.06   4096  49.63  534.932 1028.842   48.232  5878.59  4575.01 1333.964  127.9   0.0   0.0
11:06:03.001     7341    553.0    2.16   4096  50.09  291.319  555.145   26.538  4947.73  4331.76  930.171  128.0   0.0   0.0
11:06:04.001     7342    103.0    0.40   4096  43.69  356.931  637.607  139.164  5498.16  5793.68 1103.215  127.9   0.0   0.0
11:06:05.002     7343    124.0    0.48   4096  48.39  557.411 1151.677   0.286  5852.79    0.43 1310.418  128.0   0.0   0.0
11:06:06.002     7344    512.0    2.00   4096  45.90  365.526  732.140   54.500  7148.55  6949.17 1178.939  128.1   0.0   0.0
11:06:07.001     7345    104.0    0.41   4096  48.08  445.630  772.286  143.171  8443.86  7717.69 1519.741  127.9   0.0   0.0
11:06:08.001     7346    203.0    0.79   4096  56.16  636.207 1132.672   0.286  9444.99    0.42 1683.053  128.0   0.0   0.0
11:06:09.001     7347    237.0    0.93   4096  50.21  573.815 1058.516   85.007  9709.71 10000.52 1700.200  127.9   0.0   0.0
11:06:10.001     7348    342.0    1.34   4096  44.74  779.534 1711.994   24.686 10430.75  4597.19 2287.474  128.0   0.0   0.0
11:06:11.002     7349    265.0    1.04   4096  48.68  526.416 1081.143   0.242  8386.50    0.39 1540.784  128.0   0.0   0.0
11:06:12.001     7350    167.0    0.65   4096  53.29  441.639  828.474   0.251  6304.54    0.43 1329.067  127.9   0.0   0.0
11:06:13.002     7351    223.0    0.87   4096  51.12  648.932 1225.246   46.181  7417.14  5006.28 1612.059  128.0   0.0   0.0
11:06:14.002     7352    362.0    1.41   4096  46.69  385.074  824.525   0.269  6449.28    5.12 1240.424  128.0   0.0   0.0
11:06:15.001     7353    166.0    0.65   4096  45.78  594.156 1297.434   0.277  6448.72    0.43 1518.776  127.9   0.0   0.0
11:06:16.001     7354    901.0    3.52   4096  48.61  338.495  671.356   23.608  7463.71  7254.85 1163.933  128.0   0.0   0.0
11:06:17.001     7355    338.0    1.32   4096  52.37  256.145  482.927   6.825  5800.68  1033.72  801.015  127.9   0.0   0.0
11:06:18.001     7356   38103.0   148.84   4096  50.43   8.047   14.994   0.980  7092.49  1692.23  128.940  128.0   1.3   1.0 <<<< latency gets back to normal

  • 聚合中的磁盘和备用磁盘都会发生这种情况

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