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为什么外部加密会导致重复数据删除节省降低

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适用于

  • ONTAP
  • 存储效率
  • 加密 

回答

  • 在写入 ONTAP 之前在外部加密的文件与在 ONTAP 内本机加密的文件相比，重复数据删除节省效果较低。
  • 外部加密会改变数据块模式，阻止其他类似文件之间的有效匹配。
  • 因此，加密的块字符串与存储在同一系统上的几乎相同的文件不一致。
  • 这种缺少块级相似性会显著降低重复数据删除效率。
  • 当使用 ONTAP 功能（如 NVE 或其他支持的加密选项）对文件进行未加密或本机加密时，可以完全实现重复数据删除节省。

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