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每个SnapMirror更新的XDP传输是什么?

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适用场景

  • ONTAP 9
  • 具有存储效率的逻辑复制(Logical Replication with Storage效率、LRSE)。

问题解答

  • 每次更新XDP类型的SnapMirror均为仅增量传输。
  • 因为它使用名为 LRSE的逻辑复制引擎、而LRSE 只会将两个Snapshot副本之间的差异从主副本传输到二级副本。
  • 增量可通过命令 volume Snapshot show-delta来计算

追加信息

具有存储效率的逻辑复制(Logical Replication with Storage效率、LRSE)。
LRSE使用块级元数据和对文件系统的了解来确定间接指针级别的Snapshot副本之间的差异。LRSE可通过两个流将数据从源传输到目标
.....
性能特征也与原始块复制引擎的特征类似、因为复制引擎仅将两个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。从ONTAP 9.3开始、SnapMirror XDP模式将取代SnapMirror数据保护(DP)模式作为SnapMirror的默认模式。有关详细信息、请参见XDP。XDP将DP替换为SnapMirror的默认设置。
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