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ボリュームの負荷が高いワークロードが原因でSnapMirror Sync(SM-S)プライマリボリュームのレイテンシが高くなっています

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Category:
ontap-9
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環境

  • ONTAP 9
  • SnapMirror同期(SM-S)

問題

  • クライアントから、 sm-Sync from QoSコマンドでsm-syncプライマリボリュームの書き込み時間が非常に長いと報告されています。 
cluster::> qos statistics workload latency show -vserver SVM1 -volume vol1 Workload ID Latency Network Cluster Data Disk QoS Max QoS Min NVRAM Cloud FlexCache SM Sync VA --------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- vol1 4040 54.16ms 09.72ms 0ms 57.00us 14.00us 0ms 1.00us 0ms 0ms 0ms 44.44ms 0ms vol1 4040 58.16ms 09.72ms 0ms 57.00us 14.00us 0ms 1.00us 0ms 0ms 0ms 48.44ms 0ms
  • クライアントから コピー/書き込み処理に時間がかかると報告されることがある
$ time echo '123' >/cbsrun/test1.txt;time echo '123' >/cbsrun/test20220401/test2.txt; real 0m1.08s user 0m0.00s sys 0m0.00s real 0m3.26s user 0m0.00s sys 0m0.00s

 

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