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在卷移动转换阶段,延迟会增加

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适用场景

ONTAP 9

问题描述

在此节点上某个卷的卷移动转换阶段,存储器上的所有卷都出现短暂的速度缓慢。 

示例: 下面是在转换阶段从客户端和存储器的一个受影响卷上观察到的性能状况。 

注意: 这不是要经历卷移动转换阶段的卷

VDbentch log:11 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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