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为什么 SnapMirror 目标卷空间使用量小于源卷?

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dp
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适用场景

ONTAP 9.3 或更高版本

问题解答

  • 从 ONTAP 9.3 开始, SnapMirror 扩展数据保护( XDP )模式将取代 SnapMirror 数据保护( DP )模式作为 SnapMirror 默认设置。
    • 通过 XDP 传输的数据将使用具有存储效率的逻辑复制( Logical Replication with Storage Efficiency , LRSE )。
  • LRSE 的复制引擎仅将两个 Snapshot 副本之间的差异从主副本传输到二级副本。
    • 这种仅增量传输可节省存储和网络带宽。

追加信息

  • 有关 LRSE 的详细信息,请参阅TR-4015 《 ONTAP 9 的 SnapMirror 配置和最佳实践指南》
  • volume move 也可以使用 LRSE 的复制引擎来触发相同的条件。
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