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WAN経由のCIFS/SMBファイルコピーのパフォーマンスが低下

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ontap-9
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nas
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環境

  • ONTAP 9
  • CIFS
  • WANを使用する環境

問題

  • NetApp CIFS/SMB共有からリモートサイトに高レイテンシのWAN経由でデータを転送すると、ファイルのコピー速度が大幅に遅くなりますが、ローカルサイト転送は高速のままです。
  • ローカルサイトのコピー速度は速く(~200Mbps)、リモートサイトのコピー速度はかなり遅い(~45Mbps)
  • ONTAP QoS影響を受けたボリュームのレイテンシは一貫して低いです。(~3ミリ秒)

::> qos statistics volume latency show -volume volume1 -vserver svm1
Workload       ID   Latency   Network   Cluster     Data     Disk   QoS Max   QoS Min    NVRAM    Cloud  FlexCache   SM Sync      VA    AVSCAN
--------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
-total-        -   478.00us   179.00us   72.00us   102.00us   122.00us     0ms     0ms    3.00us     0ms     0ms     0ms     0ms     0ms
volume1      57348   1.88ms  86.00us   43.00us   832.00us   917.00us     0ms     0ms     0ms     0ms     0ms     0ms     0ms     0ms
-total-        -   278.00us   39.00us   62.00us   65.00us   111.00us     0ms     0ms    1.00us     0ms     0ms     0ms     0ms     0ms
volume1      57348   2.11ms  78.00us   48.00us   814.00us  1168.00us     0ms     0ms     0ms     0ms     0ms     0ms     0ms     0ms
-total-        -   252.00us   40.00us   63.00us   65.00us   83.00us     0ms     0ms    1.00us     0ms     0ms     0ms     0ms     0ms
volume1      57348    1.70ms   77.00us   48.00us   619.00us   960.00us     0ms     0ms     0ms     0ms     0ms     0ms     0ms     0ms
-total-        -   243.00us   40.00us   63.00us   69.00us   69.00us     0ms     0ms    2.00us     0ms     0ms     0ms     0ms     0ms
volume1      57348  1119.00us   73.00us   43.00us   581.00us   422.00us     0ms     0ms     0ms     0ms     0ms     0ms     0ms     0ms
-total-        -   223.00us   43.00us   71.00us   53.00us   54.00us     0ms     0ms    2.00us     0ms     0ms     0ms     0ms     0ms
volume1      57348  1078.00us   80.00us   48.00us   530.00us   420.00us     0ms     0ms     0ms     0ms     0ms     0ms     0ms     0ms
-total-        -   225.00us   41.00us   68.00us   52.00us   62.00us     0ms     0ms    2.00us     0ms     0ms     0ms     0ms     0ms
volume1      57348   1.60ms  89.00us   52.00us   561.00us   898.00us     0ms     0ms     0ms     0ms     0ms     0ms     0ms     0ms
-total-        -   188.00us   40.00us   60.00us   35.00us   51.00us     0ms     0ms    2.00us     0ms     0ms     0ms     0ms     0ms

  • パケットトレースにストレージ側の遅延が表示されない

===========================================================================
SMB2 Service Response Time Statistics:
Index  Procedure  Calls  Min SRT (s)  Max SRT (s)  Avg SRT (s)  Sum SRT (s)
---------------------------------------------------------------------------
SMB2
Close      6    8    0.000045    0.000144    0.000104    0.000834
Create      5    14    0.000030    0.011760    0.001081    0.015127
Find      14    5    0.000195    0.033704    0.018225    0.091123
GetInfo     16    5    0.000032    0.000038    0.000034    0.000172
Ioctl      11    4    0.000033    0.000196    0.000115    0.000458
Read       8    12    0.000036    0.021576    0.003578    0.042934
Tree Connect   3    1    0.000055    0.000055    0.000055    0.000055
Write      9    1    0.000049    0.000049    0.000049    0.000049
SMB2
---------------------------------------------------------------------------

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