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volume show-footprintコマンドは、Delayed Freesで使用されているスペースを表示します

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環境

  • ONTAP 9.2以降

問題

  • ファイルを削除した後、スペースは再利用されません。
  • Delayed Freesに大きな値があり、volume show-footprintコマンドを実行しても、-tiering-policy allを設定しても変更されない場合があります。
  • 下記のようにDelayed Freesに大きな値があり、それはパフォーマンス階層の残りのデータです。

Cluster::> volume show-footprint
output ommitted)
    Vserver : SVM1
      Volume  : vol1

      Feature                                          Used    Used%
      --------------------------------           ----------    -----
      Volume Data Footprint                         15.41GB       0%
             Footprint in Performance Tier
                                                     4.65GB      25%
             Footprint in <Cloud Tier name>
                                                    14.14GB      75%
      Volume Guarantee                                   0B       0%
      Flexible Volume Metadata                      858.1MB       0%
      Cross Volume Deduplication                        4KB       0%
      Delayed Frees                                  3.38GB       0%
      Total Footprint                               19.62GB       0%

  • この症状は、total aggregate used size が total volume size を超えている場合にも見られることがあります。
  • Delayed frees used space が大きく、値が 1% 未満のときに減少しません。

 

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