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ボリューム移動のカットオーバーフェーズ中にレイテンシが増加

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環境

ONTAP 9

問題

ストレージシステム上のすべてのボリュームで、このノード上のボリューム移動のカットオーバーフェーズ中に速度が低下します。 

:カットオーバーフェーズ中にクライアントと Filer の両方から影響を受けた 1 つのボリューム上にパフォーマンス統計が表示されます。 

注: ボリューム移動のカットオーバーフェーズを実施するボリュームではありません

VDbentch log11 18, 2020  interval i/o   MB/sec   bytes   read  resp    read   write    resp    resp  queue  cpu%  cpu%
            rate  1024**2   i/o    pct  time   resp    resp    max   stddev depth sys+u   sys

13:32:50.043  501   17260.00   269.69   16384  79.79   0.921   0.910   0.965   7.402   0.311  15.9  44.2  35.6
13:32:51.043  502   15972.00   249.56   16384  79.66   0.996   1.033   0.850   25.002   0.889  15.9  44.8  35.6
13:32:52.042  503   8553.00   133.64   16384  80.09   1.860   1.868   1.829   8.574   1.722  15.9  22.0  16.5
13:32:53.042  504   3407.00  53.23   16384  80.83  4.693  4.690   4.704   9.185   1.325  16.0   8.9   7.3
13:32:54.044  505   3351.00  52.36   16384  79.14  4.768  4.769   4.765   9.339   1.131  16.0  11.4   9.0
13:32:55.042  506   3406.00   53.22   16384  80.59  4.679  4.694   4.616   10.017   1.302  15.9  10.8   8.2
13:32:56.042  507   3339.00   52.17   16384  81.28  4.796   4.786   4.836   9.095   1.194  16.0  10.6   8.1
13:32:57.042  508   3399.00   53.11   16384  80.94  4.700  4.697   4.714   9.183   1.204  16.0   9.7   8.2
13:32:58.043  509   3570.00   55.78   16384  81.32  4.462   4.473   4.417   9.443   1.454  16.0  10.3   8.7
13:32:59.042  510   6971.00   108.92   16384  80.10  2.297  2.315   2.225   13.173   1.853  15.9  21.1  16.6
13:33:00.044  511   18303.00   285.98   16384  79.92   0.868   0.870   0.858   4.062   0.234  15.9  46.5  39.6
13:33:01.043  512   18439.00   288.11   16384  80.43   0.863   0.874   0.814   6.378   0.353  15.9  48.5  39.3
13:33:02.042  513   17853.00   278.95   16384  79.77   0.891   0.901   0.851   9.553   0.419  15.9  53.1  36.9

qos statistics volume latency show
2020/11/18 13:32:48 Workload       ID   Latency   Network   Cluster    Data    Disk   QoS Max   QoS Min    NVRAM    Cloud  FlexCache   SM Sync      VA
2020/11/18 13:32:48 --------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
2020/11/18 13:32:48 volume2  51455   360.00us   261.00us     0ms   26.00us   69.00us     0ms     0ms    4.00us     0ms     0ms     0ms     0ms
2020/11/18 13:32:51 volume2  51455   372.00us   264.00us     0ms   28.00us   76.00us     0ms     0ms    4.00us     0ms     0ms     0ms     0ms
2020/11/18 13:32:54 volume2 51455  1004.00us   160.00us     0ms  682.00us  159.00us     0ms    0ms   3.00us     0ms    0ms    0ms    0ms
2020/11/18 13:32:57 volume2 51455    4.21ms   138.00us     0ms   3.95ms  122.00us     0ms    0ms   4.00us     0ms    0ms    0ms    0m
2020/11/18 13:33:00 volume2 51455    3.81ms   137.00us     0ms   3.54ms  127.00us     0ms    0ms   4.00us     0ms    0ms    0ms    0ms
2020/11/18 13:33:03 volume2  51455   366.00us   143.00us     0ms   128.00us   92.00us     0ms     0ms    3.00us     0ms     0ms     0ms     0ms
2020/11/18 13:33:06 volume2  51455   322.00us   132.00us     0ms   105.00us   82.00us     0ms     0ms    3.00us     0ms     0ms     0ms     0ms

 

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