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MTU の不一致が原因の NDMP パフォーマンス問題

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Category:
ndmp
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dp
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環境

  • ONTAP 9
  • CommVault

問題

  • ほとんどの場合、バックアップが失敗しており、パフォーマンス問題が認識されています
  • バックアップログのエラー:
dmp Tue Mar 17 13:23:52 EDT 2020 /BackupSVM/BackupVol(3) Log_msg (Write DIRNET for BKP ID=271, type=3 interrupted while at waiting for max inflight. Error = Broken pipe.)
dmp Tue Mar 17 13:23:52 EDT 2020 /BackupSVM/BackupVol(3) Error (Write to socket failed)
dmp Tue Mar 17 13:23:52 EDT 2020 /BackupSVM/BackupVol(3) Tape_close (ndmp)
dmp Tue Mar 17 13:23:52 EDT 2020 /BackupSVM/BackupVol(3) Log_msg (Flush DIRNET called on error = -1.
  • パケットトレース分析では、 Media Agent がゼロを送信していることが示されます Windows から NetApp NDMP サーバ
  • disallow -fragmentation を true に設定したジャンボフレームを使用した ping は、 Media Agent に到達できませんでしたが、 Media Agent へのゲートウェイに到達できます

::> net ping -vserver <> -lif <> -destination <> -disallow-fragmentation  true -packet-size 8972

 

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